20315609056656 has 45 divisors (see below), whose sum is σ = 56855640604971. Its totient is φ = 6771851656416.

The previous prime is 20315609056627. The next prime is 20315609056663. The reversal of 20315609056656 is 65665090651302.

The square root of 20315609056656 is 4507284.

It is a perfect power (a square), and thus also a powerful number.

20315609056656 is a `hidden beast` number, since 2 + 0 + 3 + 15 + 60 + 9 + 0 + 566 + 5 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 53899605 + ... + 54275211.

Almost surely, 2^{20315609056656} is an apocalyptic number.

20315609056656 is the 4507284-th square number.

It is an amenable number.

20315609056656 is an abundant number, since it is smaller than the sum of its proper divisors (36540031548315).

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

20315609056656 is an frugal number, since it uses more digits than its factorization.

20315609056656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751228 (or 375612 counting only the distinct ones).

The product of its (nonzero) digits is 8748000, while the sum is 54.

The spelling of 20315609056656 in words is "twenty trillion, three hundred fifteen billion, six hundred nine million, fifty-six thousand, six hundred fifty-six".