72256981540 has 24 divisors (see below), whose sum is σ = 151904813760. Its totient is φ = 28871335008.

The previous prime is 72256981519. The next prime is 72256981561. The reversal of 72256981540 is 4518965227.

It is an interprime number because it is at equal distance from previous prime (72256981519) and next prime (72256981561).

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, 1947262 + ... + 1984021.

It is an arithmetic number, because the mean of its divisors is an integer number (6329367240).

Almost surely, 2^72256981540 is an apocalyptic number.

It is an amenable number.

72256981540 is an abundant number, since it is smaller than the sum of its proper divisors (79647832220).

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

72256981540 is a wasteful number, since it uses less digits than its factorization.

72256981540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932211 (or 3932209 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 72256981540 in words is "seventy-two billion, two hundred fifty-six million, nine hundred eighty-one thousand, five hundred forty".