72167691344 has 20 divisors (see below), whose sum is σ = 159799888224. Its totient is φ = 30929010528.

The previous prime is 72167691319. The next prime is 72167691361. The reversal of 72167691344 is 44319676127.

It is a junction number, because it is equal to n+sod(n) for n = 72167691292 and 72167691301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322177082 + ... + 322177305.

Almost surely, 2^72167691344 is an apocalyptic number.

It is an amenable number.

72167691344 is an abundant number, since it is smaller than the sum of its proper divisors (87632196880).

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

72167691344 is a wasteful number, since it uses less digits than its factorization.

72167691344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644354402 (or 644354396 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The spelling of 72167691344 in words is "seventy-two billion, one hundred sixty-seven million, six hundred ninety-one thousand, three hundred forty-four".