172764247492081 has 16 divisors (see below), whose sum is σ = 201648593954304. Its totient is φ = 144930922991424.

The previous prime is 172764247492069. The next prime is 172764247492087. The reversal of 172764247492081 is 180294742467271.

It is not a de Polignac number, because 172764247492081 - 2²⁹ = 172763710621169 is a prime.

It is a super-2 number, since 2×172764247492081² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172764247492087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20470591 + ... + 27650923.

It is an arithmetic number, because the mean of its divisors is an integer number (12603037122144).

Almost surely, 2^{172764247492081} is an apocalyptic number.

It is an amenable number.

172764247492081 is a deficient number, since it is larger than the sum of its proper divisors (28884346462223).

172764247492081 is an equidigital number, since it uses as much as digits as its factorization.

172764247492081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253520.

The product of its (nonzero) digits is 75866112, while the sum is 64.

The spelling of 172764247492081 in words is "one hundred seventy-two trillion, seven hundred sixty-four billion, two hundred forty-seven million, four hundred ninety-two thousand, eighty-one".