64872071856 has 100 divisors (see below), whose sum is σ = 191753640672. Its totient is φ = 21163918464.

The previous prime is 64872071839. The next prime is 64872071861. The reversal of 64872071856 is 65817027846.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 471595 + ... + 593418.

Almost surely, 2^64872071856 is an apocalyptic number.

It is an amenable number.

64872071856 is an abundant number, since it is smaller than the sum of its proper divisors (126881568816).

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

64872071856 is a wasteful number, since it uses less digits than its factorization.

64872071856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065080 (or 1065065 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 64872071856 in words is "sixty-four billion, eight hundred seventy-two million, seventy-one thousand, eight hundred fifty-six".