64397242560 has 168 divisors, whose sum is σ = 237842846640. Its totient is φ = 14719358976.

The previous prime is 64397242549. The next prime is 64397242579. The reversal of 64397242560 is 6524279346.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 637455 + ... + 731534.

It is an arithmetic number, because the mean of its divisors is an integer number (1415731230).

Almost surely, 2^64397242560 is an apocalyptic number.

64397242560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64397242560 is an abundant number, since it is smaller than the sum of its proper divisors (173445604080).

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

64397242560 is a wasteful number, since it uses less digits than its factorization.

64397242560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369023 (or 1369006 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 64397242560 in words is "sixty-four billion, three hundred ninety-seven million, two hundred forty-two thousand, five hundred sixty".