55315656 has 128 divisors (see below), whose sum is σ = 173260800. Its totient is φ = 16200000.

The previous prime is 55315651. The next prime is 55315657. The reversal of 55315656 is 65651355.

55315656 is a `hidden beast` number, since 553 + 1 + 56 + 56 = 666.

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 55315656.

It is not an unprimeable number, because it can be changed into a prime (55315651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73281 + ... + 74031.

It is an arithmetic number, because the mean of its divisors is an integer number (1353600).

Almost surely, 2^55315656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55315656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86630400).

55315656 is an abundant number, since it is smaller than the sum of its proper divisors (117945144).

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

55315656 is a wasteful number, since it uses less digits than its factorization.

55315656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 798 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 55315656 is about 7437.4495628542. The cubic root of 55315656 is about 381.0213888420.

The spelling of 55315656 in words is "fifty-five million, three hundred fifteen thousand, six hundred fifty-six".