72965537864 has 8 divisors (see below), whose sum is σ = 136810383510. Its totient is φ = 36482768928.

The previous prime is 72965537791. The next prime is 72965537881. The reversal of 72965537864 is 46873556927.

It can be written as a sum of positive squares in only one way, i.e., 52785062500 + 20180475364 = 229750^2 + 142058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 72965537797 and 72965537806.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560346109 + ... + 4560346124.

Almost surely, 2^72965537864 is an apocalyptic number.

It is an amenable number.

72965537864 is a deficient number, since it is larger than the sum of its proper divisors (63844845646).

72965537864 is a wasteful number, since it uses less digits than its factorization.

72965537864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9120692239 (or 9120692235 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 62.

The spelling of 72965537864 in words is "seventy-two billion, nine hundred sixty-five million, five hundred thirty-seven thousand, eight hundred sixty-four".