72155833480 has 32 divisors (see below), whose sum is σ = 163078675200. Its totient is φ = 28732902336.

The previous prime is 72155833469. The next prime is 72155833489. The reversal of 72155833480 is 8433855127.

It is a self number, because there is not a number n which added to its sum of digits gives 72155833480.

It is not an unprimeable number, because it can be changed into a prime (72155833489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4035690 + ... + 4053529.

It is an arithmetic number, because the mean of its divisors is an integer number (5096208600).

Almost surely, 2^72155833480 is an apocalyptic number.

It is an amenable number.

72155833480 is an abundant number, since it is smaller than the sum of its proper divisors (90922841720).

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

72155833480 is a wasteful number, since it uses less digits than its factorization.

72155833480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8089453 (or 8089449 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 72155833480 in words is "seventy-two billion, one hundred fifty-five million, eight hundred thirty-three thousand, four hundred eighty".