64157031220707 has 24 divisors (see below), whose sum is σ = 92860802246160. Its totient is φ = 42683951889600.

The previous prime is 64157031220703. The next prime is 64157031220721. The reversal of 64157031220707 is 70702213075146.

64157031220707 is a `hidden beast` number, since 6 + 4 + 1 + 570 + 3 + 1 + 2 + 2 + 0 + 70 + 7 = 666.

It is not a de Polignac number, because 64157031220707 - 2² = 64157031220703 is a prime.

It is a super-2 number, since 2×64157031220707² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64157031220703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7073713 + ... + 13354829.

It is an arithmetic number, because the mean of its divisors is an integer number (3869200093590).

Almost surely, 2^{64157031220707} is an apocalyptic number.

64157031220707 is a deficient number, since it is larger than the sum of its proper divisors (28703771025453).

64157031220707 is a wasteful number, since it uses less digits than its factorization.

64157031220707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283443 (or 6283440 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 64157031220707 in words is "sixty-four trillion, one hundred fifty-seven billion, thirty-one million, two hundred twenty thousand, seven hundred seven".