606161556 has 432 divisors, whose sum is σ = 2195968320. Its totient is φ = 143700480.

The previous prime is 606161539. The next prime is 606161557. The reversal of 606161556 is 655161606.

It is a super-2 number, since 2×606161556² = 734863663944682272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 606161556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606161557) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6810760 + ... + 6810848.

It is an arithmetic number, because the mean of its divisors is an integer number (5083260).

Almost surely, 2^606161556 is an apocalyptic number.

606161556 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 606161556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097984160).

606161556 is an abundant number, since it is smaller than the sum of its proper divisors (1589806764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

606161556 is a wasteful number, since it uses less digits than its factorization.

606161556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 606161556 is about 24620.3484134567. The cubic root of 606161556 is about 846.3099814720.

Subtracting 606161556 from its reverse (655161606), we obtain a triangular number (49000050 = T₉₈₉₉).

It can be divided in two parts, 60 and 6161556, that added together give a palindrome (6161616).

The spelling of 606161556 in words is "six hundred six million, one hundred sixty-one thousand, five hundred fifty-six".