172632478817 has 2 divisors, whose sum is σ = 172632478818. Its totient is φ = 172632478816.

The previous prime is 172632478801. The next prime is 172632478913. The reversal of 172632478817 is 718874236271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130607068816 + 42025410001 = 361396^2 + 205001^2 .

It is a cyclic number.

It is not a de Polignac number, because 172632478817 - 2⁴ = 172632478801 is a prime.

It is not a weakly prime, because it can be changed into another prime (172632478517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86316239408 + 86316239409.

It is an arithmetic number, because the mean of its divisors is an integer number (86316239409).

Almost surely, 2^172632478817 is an apocalyptic number.

It is an amenable number.

172632478817 is a deficient number, since it is larger than the sum of its proper divisors (1).

172632478817 is an equidigital number, since it uses as much as digits as its factorization.

172632478817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6322176, while the sum is 56.

The spelling of 172632478817 in words is "one hundred seventy-two billion, six hundred thirty-two million, four hundred seventy-eight thousand, eight hundred seventeen".