64136728160 has 48 divisors (see below), whose sum is σ = 152540010000. Its totient is φ = 25482502656.

The previous prime is 64136728147. The next prime is 64136728171. The reversal of 64136728160 is 6182763146.

It is a super-2 number, since 2×64136728160² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321310 + ... + 1368989.

It is an arithmetic number, because the mean of its divisors is an integer number (3177916875).

Almost surely, 2^64136728160 is an apocalyptic number.

It is an amenable number.

64136728160 is an abundant number, since it is smaller than the sum of its proper divisors (88403281840).

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

64136728160 is a wasteful number, since it uses less digits than its factorization.

64136728160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690463 (or 2690455 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 64136728160 in words is "sixty-four billion, one hundred thirty-six million, seven hundred twenty-eight thousand, one hundred sixty".