400377665124 has 48 divisors (see below), whose sum is σ = 1052636135040. Its totient is φ = 131579511840.

The previous prime is 400377665117. The next prime is 400377665159. The reversal of 400377665124 is 421566773004.

400377665124 is a `hidden beast` number, since 4 + 0 + 0 + 3 + 77 + 66 + 512 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 400377665124.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26099379 + ... + 26114714.

It is an arithmetic number, because the mean of its divisors is an integer number (21929919480).

Almost surely, 2^400377665124 is an apocalyptic number.

It is an amenable number.

400377665124 is an abundant number, since it is smaller than the sum of its proper divisors (652258469916).

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

400377665124 is a wasteful number, since it uses less digits than its factorization.

400377665124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52214177 (or 52214169 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 400377665124 in words is "four hundred billion, three hundred seventy-seven million, six hundred sixty-five thousand, one hundred twenty-four".