72511128289992 has 64 divisors (see below), whose sum is σ = 207175286620800. Its totient is φ = 20717401789440.

The previous prime is 72511128289991. The next prime is 72511128290017. The reversal of 72511128289992 is 29998282111527.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72511128289991) 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, 98725392 + ... + 99457152.

It is an arithmetic number, because the mean of its divisors is an integer number (3237113853450).

Almost surely, 2^{72511128289992} is an apocalyptic number.

It is an amenable number.

72511128289992 is an abundant number, since it is smaller than the sum of its proper divisors (134664158330808).

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

72511128289992 is a wasteful number, since it uses less digits than its factorization.

72511128289992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321606 (or 1321602 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 66.

The spelling of 72511128289992 in words is "seventy-two trillion, five hundred eleven billion, one hundred twenty-eight million, two hundred eighty-nine thousand, nine hundred ninety-two".