6400431663560 has 32 divisors (see below), whose sum is σ = 15710150448000. Its totient is φ = 2327429695680.

The previous prime is 6400431663547. The next prime is 6400431663629. The reversal of 6400431663560 is 653661340046.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 7273217360 + ... + 7273218239.

It is an arithmetic number, because the mean of its divisors is an integer number (490942201500).

Almost surely, 2^{6400431663560} is an apocalyptic number.

It is an amenable number.

6400431663560 is an abundant number, since it is smaller than the sum of its proper divisors (9309718784440).

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

6400431663560 is a wasteful number, since it uses less digits than its factorization.

6400431663560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14546435621 (or 14546435617 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 6400431663560 in words is "six trillion, four hundred billion, four hundred thirty-one million, six hundred sixty-three thousand, five hundred sixty".