61722612 has 72 divisors (see below), whose sum is σ = 184084992. Its totient is φ = 17064000.

The previous prime is 61722607. The next prime is 61722637. The reversal of 61722612 is 21622716.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3862 + ... + 11762.

It is an arithmetic number, because the mean of its divisors is an integer number (2556736).

Almost surely, 2^61722612 is an apocalyptic number.

61722612 is a gapful number since it is divisible by the number (62) 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 61722612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92042496).

61722612 is an abundant number, since it is smaller than the sum of its proper divisors (122362380).

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

61722612 is a wasteful number, since it uses less digits than its factorization.

61722612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7949 (or 7944 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 61722612 is about 7856.3739727689. The cubic root of 61722612 is about 395.1980249400.

The spelling of 61722612 in words is "sixty-one million, seven hundred twenty-two thousand, six hundred twelve".