405656163005652 has 72 divisors (see below), whose sum is σ = 1104301282191744. Its totient is φ = 124815578619456.

The previous prime is 405656163005647. The next prime is 405656163005701. The reversal of 405656163005652 is 256500361656504.

405656163005652 is a `hidden beast` number, since 4 + 0 + 5 + 65 + 6 + 16 + 3 + 0 + 0 + 565 + 2 = 666.

It is a super-3 number, since 3×405656163005652³ (a number of 45 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28656553 + ... + 40404335.

Almost surely, 2^{405656163005652} is an apocalyptic number.

It is an amenable number.

405656163005652 is an abundant number, since it is smaller than the sum of its proper divisors (698645119186092).

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

405656163005652 is a wasteful number, since it uses less digits than its factorization.

405656163005652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11821589 (or 11821584 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 54.

The spelling of 405656163005652 in words is "four hundred five trillion, six hundred fifty-six billion, one hundred sixty-three million, five thousand, six hundred fifty-two".