172749947271 has 32 divisors (see below), whose sum is σ = 257948955648. Its totient is φ = 101938237440.

The previous prime is 172749947261. The next prime is 172749947327.

172749947271 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 172749947271 - 2⁵ = 172749947239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172749947261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10795 + ... + 587891.

It is an arithmetic number, because the mean of its divisors is an integer number (8060904864).

Almost surely, 2^172749947271 is an apocalyptic number.

172749947271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172749947271 is a deficient number, since it is larger than the sum of its proper divisors (85199008377).

172749947271 is a wasteful number, since it uses less digits than its factorization.

172749947271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577351.

The product of its digits is 12446784, while the sum is 60.

The spelling of 172749947271 in words is "one hundred seventy-two billion, seven hundred forty-nine million, nine hundred forty-seven thousand, two hundred seventy-one".