23507128172271 has 4 divisors (see below), whose sum is σ = 31342837563032. Its totient is φ = 15671418781512.

The previous prime is 23507128172221. The next prime is 23507128172273. The reversal of 23507128172271 is 17227182170532.

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

It is not a de Polignac number, because 23507128172271 - 2¹⁸ = 23507127910127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23507128172271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23507128172273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3917854695376 + ... + 3917854695381.

It is an arithmetic number, because the mean of its divisors is an integer number (7835709390758).

Almost surely, 2^{23507128172271} is an apocalyptic number.

23507128172271 is a deficient number, since it is larger than the sum of its proper divisors (7835709390761).

23507128172271 is an equidigital number, since it uses as much as digits as its factorization.

23507128172271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7835709390760.

The product of its (nonzero) digits is 658560, while the sum is 48.

The spelling of 23507128172271 in words is "twenty-three trillion, five hundred seven billion, one hundred twenty-eight million, one hundred seventy-two thousand, two hundred seventy-one".