64156731432 has 32 divisors (see below), whose sum is σ = 160398813600. Its totient is φ = 21384645824.

The previous prime is 64156731383. The next prime is 64156731437. The reversal of 64156731432 is 23413765146.

It is not an unprimeable number, because it can be changed into a prime (64156731437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712783 + ... + 797729.

It is an arithmetic number, because the mean of its divisors is an integer number (5012462925).

Almost surely, 2^64156731432 is an apocalyptic number.

It is an amenable number.

64156731432 is an abundant number, since it is smaller than the sum of its proper divisors (96242082168).

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

64156731432 is a wasteful number, since it uses less digits than its factorization.

64156731432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116425 (or 116421 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The spelling of 64156731432 in words is "sixty-four billion, one hundred fifty-six million, seven hundred thirty-one thousand, four hundred thirty-two".