172646646271 has 4 divisors (see below), whose sum is σ = 188341795944. Its totient is φ = 156951496600.

The previous prime is 172646646269. The next prime is 172646646283.

172646646271 is nontrivially palindromic in base 10.

172646646271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172646646271 - 2¹ = 172646646269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172646646371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7847574820 + ... + 7847574841.

It is an arithmetic number, because the mean of its divisors is an integer number (47085448986).

Almost surely, 2^172646646271 is an apocalyptic number.

172646646271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172646646271 is a deficient number, since it is larger than the sum of its proper divisors (15695149673).

172646646271 is a wasteful number, since it uses less digits than its factorization.

172646646271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15695149672.

The product of its digits is 4064256, while the sum is 52.

The spelling of 172646646271 in words is "one hundred seventy-two billion, six hundred forty-six million, six hundred forty-six thousand, two hundred seventy-one".