64157171882472 has 24 divisors (see below), whose sum is σ = 173759007181890. Its totient is φ = 21385723960800.

The previous prime is 64157171882429. The next prime is 64157171882513. The reversal of 64157171882472 is 27428817175146.

It is a happy number.

64157171882472 is a `hidden beast` number, since 6 + 4 + 1 + 5 + 71 + 7 + 18 + 82 + 472 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52772175686916 + 11384996195556 = 7264446^2 + 3374166^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×64157171882472² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 445535915779 + ... + 445535915922.

Almost surely, 2^{64157171882472} is an apocalyptic number.

It is an amenable number.

64157171882472 is an abundant number, since it is smaller than the sum of its proper divisors (109601835299418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64157171882472 is a wasteful number, since it uses less digits than its factorization.

64157171882472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891071831713 (or 891071831706 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 63.

The spelling of 64157171882472 in words is "sixty-four trillion, one hundred fifty-seven billion, one hundred seventy-one million, eight hundred eighty-two thousand, four hundred seventy-two".