64757168840 has 128 divisors (see below), whose sum is σ = 187124636160. Its totient is φ = 19603482624.

The previous prime is 64757168807. The next prime is 64757168843. The reversal of 64757168840 is 4886175746.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (64757168843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 303029 + ... + 470468.

It is an arithmetic number, because the mean of its divisors is an integer number (1461911220).

Almost surely, 2^64757168840 is an apocalyptic number.

It is an amenable number.

64757168840 is an abundant number, since it is smaller than the sum of its proper divisors (122367467320).

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

64757168840 is a wasteful number, since it uses less digits than its factorization.

64757168840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773551 (or 773547 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 64757168840 in words is "sixty-four billion, seven hundred fifty-seven million, one hundred sixty-eight thousand, eight hundred forty".