64615264632644 has 48 divisors (see below), whose sum is σ = 123803839998720. Its totient is φ = 29264064260640.

The previous prime is 64615264632637. The next prime is 64615264632649. The reversal of 64615264632644 is 44623646251646.

It is a super-2 number, since 2×64615264632644² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64615264632649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136474187 + ... + 136946829.

It is an arithmetic number, because the mean of its divisors is an integer number (2579246666640).

Almost surely, 2^{64615264632644} is an apocalyptic number.

It is an amenable number.

64615264632644 is a deficient number, since it is larger than the sum of its proper divisors (59188575366076).

64615264632644 is a wasteful number, since it uses less digits than its factorization.

64615264632644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483920 (or 483918 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 59.

The spelling of 64615264632644 in words is "sixty-four trillion, six hundred fifteen billion, two hundred sixty-four million, six hundred thirty-two thousand, six hundred forty-four".