72864171928 has 16 divisors (see below), whose sum is σ = 140312764080. Its totient is φ = 35447434848.

The previous prime is 72864171917. The next prime is 72864171931. The reversal of 72864171928 is 82917146827.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 123081076 + ... + 123081667.

It is an arithmetic number, because the mean of its divisors is an integer number (8769547755).

Almost surely, 2^72864171928 is an apocalyptic number.

It is an amenable number.

72864171928 is a deficient number, since it is larger than the sum of its proper divisors (67448592152).

72864171928 is a wasteful number, since it uses less digits than its factorization.

72864171928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246162786 (or 246162782 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 55.

The spelling of 72864171928 in words is "seventy-two billion, eight hundred sixty-four million, one hundred seventy-one thousand, nine hundred twenty-eight".