72831517220 has 48 divisors (see below), whose sum is σ = 190686158208. Its totient is φ = 22700732160.

The previous prime is 72831517189. The next prime is 72831517243. The reversal of 72831517220 is 2271513827.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23645057 + ... + 23648136.

It is an arithmetic number, because the mean of its divisors is an integer number (3972628296).

Almost surely, 2^72831517220 is an apocalyptic number.

72831517220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72831517220 is an abundant number, since it is smaller than the sum of its proper divisors (117854640988).

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

72831517220 is a wasteful number, since it uses less digits than its factorization.

72831517220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47293220 (or 47293218 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 72831517220 in words is "seventy-two billion, eight hundred thirty-one million, five hundred seventeen thousand, two hundred twenty".