156920561424 has 135 divisors (see below), whose sum is σ = 482873551797. Its totient is φ = 47535840000.

The previous prime is 156920561419. The next prime is 156920561431. The reversal of 156920561424 is 424165029651.

The square root of 156920561424 is 396132.

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

156920561424 is a `hidden beast` number, since 1 + 5 + 6 + 9 + 2 + 0 + 5 + 614 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 84408843024 + 72511718400 = 290532^2 + 269280^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 156920561424.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 52287924 + ... + 52290924.

Almost surely, 2^156920561424 is an apocalyptic number.

156920561424 is the 396132-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156920561424

156920561424 is an abundant number, since it is smaller than the sum of its proper divisors (325952990373).

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

156920561424 is an equidigital number, since it uses as much as digits as its factorization.

156920561424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038 (or 3017 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 156920561424 in words is "one hundred fifty-six billion, nine hundred twenty million, five hundred sixty-one thousand, four hundred twenty-four".