172980788402 has 16 divisors (see below), whose sum is σ = 260947834200. Its totient is φ = 85999441920.

The previous prime is 172980788401. The next prime is 172980788441. The reversal of 172980788402 is 204887089271.

It can be written as a sum of positive squares in 4 ways, for example, as 126829289161 + 46151499241 = 356131^2 + 214829^2 .

It is not an unprimeable number, because it can be changed into a prime (172980788401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41999 + ... + 589682.

Almost surely, 2^172980788402 is an apocalyptic number.

172980788402 is a deficient number, since it is larger than the sum of its proper divisors (87967045798).

172980788402 is a wasteful number, since it uses less digits than its factorization.

172980788402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632461.

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 172980788402 in words is "one hundred seventy-two billion, nine hundred eighty million, seven hundred eighty-eight thousand, four hundred two".