56637431402 has 16 divisors (see below), whose sum is σ = 86476543272. Its totient is φ = 27813289920.

The previous prime is 56637431359. The next prime is 56637431443. The reversal of 56637431402 is 20413473665.

It can be written as a sum of positive squares in 4 ways, for example, as 31991257321 + 24646174081 = 178861^2 + 156991^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 56637431402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260273 + ... + 425460.

Almost surely, 2^56637431402 is an apocalyptic number.

56637431402 is a deficient number, since it is larger than the sum of its proper divisors (29839111870).

56637431402 is a wasteful number, since it uses less digits than its factorization.

56637431402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686473.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 56637431402 in words is "fifty-six billion, six hundred thirty-seven million, four hundred thirty-one thousand, four hundred two".