72172651536616 has 32 divisors (see below), whose sum is σ = 135475633125000. Its totient is φ = 36045820302336.

The previous prime is 72172651536599. The next prime is 72172651536721. The reversal of 72172651536616 is 61663515627127.

It can be written as a sum of positive squares in 4 ways, for example, as 67011349114116 + 5161302422500 = 8186046^2 + 2271850^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140285740 + ... + 140799268.

Almost surely, 2^{72172651536616} is an apocalyptic number.

It is an amenable number.

72172651536616 is a deficient number, since it is larger than the sum of its proper divisors (63302981588384).

72172651536616 is a wasteful number, since it uses less digits than its factorization.

72172651536616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533221 (or 533217 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 58.

The spelling of 72172651536616 in words is "seventy-two trillion, one hundred seventy-two billion, six hundred fifty-one million, five hundred thirty-six thousand, six hundred sixteen".