72553464636 has 24 divisors (see below), whose sum is σ = 169311752064. Its totient is φ = 24181583280.

The previous prime is 72553464611. The next prime is 72553464653. The reversal of 72553464636 is 63646435527.

It is a super-2 number, since 2×72553464636² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 257830 + ... + 459981.

It is an arithmetic number, because the mean of its divisors is an integer number (7054656336).

Almost surely, 2^72553464636 is an apocalyptic number.

It is an amenable number.

72553464636 is an abundant number, since it is smaller than the sum of its proper divisors (96758287428).

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

72553464636 is a wasteful number, since it uses less digits than its factorization.

72553464636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726241 (or 726239 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 51.

The spelling of 72553464636 in words is "seventy-two billion, five hundred fifty-three million, four hundred sixty-four thousand, six hundred thirty-six".