72910373656 has 8 divisors (see below), whose sum is σ = 136706950620. Its totient is φ = 36455186824.

The previous prime is 72910373611. The next prime is 72910373659. The reversal of 72910373656 is 65637301927.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72910373659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4556898346 + ... + 4556898361.

Almost surely, 2^72910373656 is an apocalyptic number.

It is an amenable number.

72910373656 is a deficient number, since it is larger than the sum of its proper divisors (63796576964).

72910373656 is a wasteful number, since it uses less digits than its factorization.

72910373656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9113796713 (or 9113796709 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 49.

The spelling of 72910373656 in words is "seventy-two billion, nine hundred ten million, three hundred seventy-three thousand, six hundred fifty-six".