72278909584 has 80 divisors (see below), whose sum is σ = 169961086080. Its totient is φ = 29086525440.

The previous prime is 72278909579. The next prime is 72278909629. The reversal of 72278909584 is 48590987227.

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, 90174 + ... + 390754.

It is an arithmetic number, because the mean of its divisors is an integer number (2124513576).

Almost surely, 2^72278909584 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72278909584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84980543040).

72278909584 is an abundant number, since it is smaller than the sum of its proper divisors (97682176496).

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

72278909584 is a wasteful number, since it uses less digits than its factorization.

72278909584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300728 (or 300722 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 72278909584 in words is "seventy-two billion, two hundred seventy-eight million, nine hundred nine thousand, five hundred eighty-four".