400665463432 has 32 divisors (see below), whose sum is σ = 809499499200. Its totient is φ = 184816586304.

The previous prime is 400665463399. The next prime is 400665463447. The reversal of 400665463432 is 234364566004.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 920932 + ... + 1284307.

It is an arithmetic number, because the mean of its divisors is an integer number (25296859350).

Almost surely, 2^400665463432 is an apocalyptic number.

It is an amenable number.

400665463432 is an abundant number, since it is smaller than the sum of its proper divisors (408834035768).

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

400665463432 is a wasteful number, since it uses less digits than its factorization.

400665463432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207005 (or 2207001 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

The spelling of 400665463432 in words is "four hundred billion, six hundred sixty-five million, four hundred sixty-three thousand, four hundred thirty-two".