64157183980 has 48 divisors (see below), whose sum is σ = 139844839680. Its totient is φ = 24697785600.

The previous prime is 64157183977. The next prime is 64157183999. The reversal of 64157183980 is 8938175146.

It is a super-2 number, since 2×64157183980² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173635 + ... + 398074.

It is an arithmetic number, because the mean of its divisors is an integer number (2913434160).

Almost surely, 2^64157183980 is an apocalyptic number.

It is an amenable number.

64157183980 is an abundant number, since it is smaller than the sum of its proper divisors (75687655700).

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

64157183980 is a wasteful number, since it uses less digits than its factorization.

64157183980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571930 (or 571928 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 64157183980 in words is "sixty-four billion, one hundred fifty-seven million, one hundred eighty-three thousand, nine hundred eighty".