72207143172 has 60 divisors (see below), whose sum is σ = 188795165020. Its totient is φ = 24065040384.

The previous prime is 72207143159. The next prime is 72207143191. The reversal of 72207143172 is 27134170227.

72207143172 is a `hidden beast` number, since 72 + 20 + 71 + 431 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34855396416 + 37351746756 = 186696^2 + 193266^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2427204 + ... + 2456772.

Almost surely, 2^72207143172 is an apocalyptic number.

It is an amenable number.

72207143172 is an abundant number, since it is smaller than the sum of its proper divisors (116588021848).

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

72207143172 is a wasteful number, since it uses less digits than its factorization.

72207143172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37122 (or 37111 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The spelling of 72207143172 in words is "seventy-two billion, two hundred seven million, one hundred forty-three thousand, one hundred seventy-two".