172980788401 has 2 divisors, whose sum is σ = 172980788402. Its totient is φ = 172980788400.

The previous prime is 172980788329. The next prime is 172980788441. The reversal of 172980788401 is 104887089271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130610682801 + 42370105600 = 361401^2 + 205840^2 .

It is an emirp because it is prime and its reverse (104887089271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172980788401 - 2²⁵ = 172947233969 is a prime.

It is a super-2 number, since 2×172980788401² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172980788441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86490394200 + 86490394201.

It is an arithmetic number, because the mean of its divisors is an integer number (86490394201).

Almost surely, 2^172980788401 is an apocalyptic number.

It is an amenable number.

172980788401 is a deficient number, since it is larger than the sum of its proper divisors (1).

172980788401 is an equidigital number, since it uses as much as digits as its factorization.

172980788401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 55.

The spelling of 172980788401 in words is "one hundred seventy-two billion, nine hundred eighty million, seven hundred eighty-eight thousand, four hundred one".