64621031031 has 24 divisors (see below), whose sum is σ = 93674999184. Its totient is φ = 42926906880.

The previous prime is 64621031017. The next prime is 64621031039. The reversal of 64621031031 is 13013012646.

64621031031 is a `hidden beast` number, since 6 + 4 + 621 + 0 + 3 + 1 + 0 + 31 = 666.

It is not a de Polignac number, because 64621031031 - 2²² = 64616836727 is a prime.

It is a super-2 number, since 2×64621031031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64621030986 and 64621031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64621031039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6659175 + ... + 6668871.

It is an arithmetic number, because the mean of its divisors is an integer number (3903124966).

Almost surely, 2^64621031031 is an apocalyptic number.

64621031031 is a deficient number, since it is larger than the sum of its proper divisors (29053968153).

64621031031 is a wasteful number, since it uses less digits than its factorization.

64621031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12271 (or 12268 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 64621031031 its reverse (13013012646), we get a palindrome (77634043677).

The spelling of 64621031031 in words is "sixty-four billion, six hundred twenty-one million, thirty-one thousand, thirty-one".