72555173800 has 48 divisors (see below), whose sum is σ = 178613774460. Its totient is φ = 27314887680.

The previous prime is 72555173777. The next prime is 72555173807. The reversal of 72555173800 is 837155527.

It can be written as a sum of positive squares in 6 ways, for example, as 53426624164 + 19128549636 = 231142^2 + 138306^2 .

It is not an unprimeable number, because it can be changed into a prime (72555173807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10666479 + ... + 10673278.

Almost surely, 2^72555173800 is an apocalyptic number.

It is an amenable number.

72555173800 is an abundant number, since it is smaller than the sum of its proper divisors (106058600660).

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

72555173800 is a wasteful number, since it uses less digits than its factorization.

72555173800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21339790 (or 21339781 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 43.

The spelling of 72555173800 in words is "seventy-two billion, five hundred fifty-five million, one hundred seventy-three thousand, eight hundred".