72500128852 has 6 divisors (see below), whose sum is σ = 126875225498. Its totient is φ = 36250064424.

The previous prime is 72500128829. The next prime is 72500128867. The reversal of 72500128852 is 25882100527.

It can be written as a sum of positive squares in only one way, i.e., 66876028816 + 5624100036 = 258604^2 + 74994^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062516103 + ... + 9062516110.

Almost surely, 2^72500128852 is an apocalyptic number.

It is an amenable number.

72500128852 is a deficient number, since it is larger than the sum of its proper divisors (54375096646).

72500128852 is a wasteful number, since it uses less digits than its factorization.

72500128852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18125032217 (or 18125032215 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 72500128852 in words is "seventy-two billion, five hundred million, one hundred twenty-eight thousand, eight hundred fifty-two".