5121235656 has 48 divisors (see below), whose sum is σ = 13887790800. Its totient is φ = 1704890592.

The previous prime is 5121235643. The next prime is 5121235673. The reversal of 5121235656 is 6565321215.

5121235656 is a `hidden beast` number, since 51 + 21 + 23 + 565 + 6 = 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 5121235656.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11475 + ... + 101853.

It is an arithmetic number, because the mean of its divisors is an integer number (289328975).

Almost surely, 2^5121235656 is an apocalyptic number.

It is an amenable number.

5121235656 is an abundant number, since it is smaller than the sum of its proper divisors (8766555144).

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

5121235656 is a wasteful number, since it uses less digits than its factorization.

5121235656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91178 (or 91171 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 5121235656 is about 71562.8091678911. The cubic root of 5121235656 is about 1723.6863940057.

It can be divided in two parts, 51212 and 35656, that added together give a palindrome (86868).

The spelling of 5121235656 in words is "five billion, one hundred twenty-one million, two hundred thirty-five thousand, six hundred fifty-six".