64315556431 has 8 divisors (see below), whose sum is σ = 73507454240. Its totient is φ = 55124648928.

The previous prime is 64315556411. The next prime is 64315556447. The reversal of 64315556431 is 13465551346.

64315556431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64315556431 - 2⁵ = 64315556399 is a prime.

It is a super-2 number, since 2×64315556431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64315556411) 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, 102756 + ... + 373081.

It is an arithmetic number, because the mean of its divisors is an integer number (9188431780).

Almost surely, 2^64315556431 is an apocalyptic number.

64315556431 is a deficient number, since it is larger than the sum of its proper divisors (9191897809).

64315556431 is a wasteful number, since it uses less digits than its factorization.

64315556431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495153.

The product of its digits is 648000, while the sum is 43.

The spelling of 64315556431 in words is "sixty-four billion, three hundred fifteen million, five hundred fifty-six thousand, four hundred thirty-one".