72178579236 has 48 divisors (see below), whose sum is σ = 169794430848. Its totient is φ = 23863200000.

The previous prime is 72178579223. The next prime is 72178579237. The reversal of 72178579236 is 63297587127.

It is not an unprimeable number, because it can be changed into a prime (72178579237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152736 + ... + 1213736.

It is an arithmetic number, because the mean of its divisors is an integer number (3537383976).

Almost surely, 2^72178579236 is an apocalyptic number.

It is an amenable number.

72178579236 is an abundant number, since it is smaller than the sum of its proper divisors (97615851612).

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

72178579236 is a wasteful number, since it uses less digits than its factorization.

72178579236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61812 (or 61810 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 57.

The spelling of 72178579236 in words is "seventy-two billion, one hundred seventy-eight million, five hundred seventy-nine thousand, two hundred thirty-six".