72725530656 has 24 divisors (see below), whose sum is σ = 190904518224. Its totient is φ = 24241843520.

The previous prime is 72725530607. The next prime is 72725530687. The reversal of 72725530656 is 65603552727.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 378778710 + ... + 378778901.

It is an arithmetic number, because the mean of its divisors is an integer number (7954354926).

Almost surely, 2^72725530656 is an apocalyptic number.

It is an amenable number.

72725530656 is an abundant number, since it is smaller than the sum of its proper divisors (118178987568).

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

72725530656 is a wasteful number, since it uses less digits than its factorization.

72725530656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757557624 (or 757557616 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 48.

The spelling of 72725530656 in words is "seventy-two billion, seven hundred twenty-five million, five hundred thirty thousand, six hundred fifty-six".