72136898656 has 24 divisors (see below), whose sum is σ = 146916745920. Its totient is φ = 34824709248.

The previous prime is 72136898611. The next prime is 72136898683. The reversal of 72136898656 is 65689863127.

It is a junction number, because it is equal to n+sod(n) for n = 72136898594 and 72136898603.

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, 38865936 + ... + 38867791.

It is an arithmetic number, because the mean of its divisors is an integer number (6121531080).

Almost surely, 2^72136898656 is an apocalyptic number.

It is an amenable number.

72136898656 is an abundant number, since it is smaller than the sum of its proper divisors (74779847264).

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

72136898656 is a wasteful number, since it uses less digits than its factorization.

72136898656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77733766 (or 77733758 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 61.

The spelling of 72136898656 in words is "seventy-two billion, one hundred thirty-six million, eight hundred ninety-eight thousand, six hundred fifty-six".