172980788737 has 2 divisors, whose sum is σ = 172980788738. Its totient is φ = 172980788736.

The previous prime is 172980788713. The next prime is 172980788767. The reversal of 172980788737 is 737887089271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134366966721 + 38613822016 = 366561^2 + 196504^2 .

It is an emirp because it is prime and its reverse (737887089271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172980788737 - 2³¹ = 170833305089 is a prime.

It is not a weakly prime, because it can be changed into another prime (172980788767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86490394368 + 86490394369.

It is an arithmetic number, because the mean of its divisors is an integer number (86490394369).

Almost surely, 2^172980788737 is an apocalyptic number.

It is an amenable number.

172980788737 is a deficient number, since it is larger than the sum of its proper divisors (1).

172980788737 is an equidigital number, since it uses as much as digits as its factorization.

172980788737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66382848, while the sum is 67.

The spelling of 172980788737 in words is "one hundred seventy-two billion, nine hundred eighty million, seven hundred eighty-eight thousand, seven hundred thirty-seven".