400512156534 has 48 divisors (see below), whose sum is σ = 1043941466880. Its totient is φ = 108409304880.

The previous prime is 400512156521. The next prime is 400512156559. The reversal of 400512156534 is 435651215004.

400512156534 is a `hidden beast` number, since 4 + 0 + 0 + 51 + 21 + 56 + 534 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83646762 + ... + 83651549.

It is an arithmetic number, because the mean of its divisors is an integer number (21748780560).

Almost surely, 2^400512156534 is an apocalyptic number.

400512156534 is an abundant number, since it is smaller than the sum of its proper divisors (643429310346).

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

400512156534 is a wasteful number, since it uses less digits than its factorization.

400512156534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167298345 (or 167298342 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 400512156534 in words is "four hundred billion, five hundred twelve million, one hundred fifty-six thousand, five hundred thirty-four".