64516205054631 has 48 divisors (see below), whose sum is σ = 95697376790400. Its totient is φ = 38627411803200.

The previous prime is 64516205054603. The next prime is 64516205054677. The reversal of 64516205054631 is 13645050261546.

It is a happy number.

It is not a de Polignac number, because 64516205054631 - 2²⁵ = 64516171500199 is a prime.

It is a super-2 number, since 2×64516205054631² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64516205054731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 629614741 + ... + 629717201.

It is an arithmetic number, because the mean of its divisors is an integer number (1993695349800).

Almost surely, 2^{64516205054631} is an apocalyptic number.

64516205054631 is a deficient number, since it is larger than the sum of its proper divisors (31181171735769).

64516205054631 is a wasteful number, since it uses less digits than its factorization.

64516205054631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123468 (or 123457 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 64516205054631 in words is "sixty-four trillion, five hundred sixteen billion, two hundred five million, fifty-four thousand, six hundred thirty-one".