23991026171 has 24 divisors (see below), whose sum is σ = 28493426304. Its totient is φ = 20135364480.

The previous prime is 23991026159. The next prime is 23991026183. The reversal of 23991026171 is 17162019932.

It is an interprime number because it is at equal distance from previous prime (23991026159) and next prime (23991026183).

It is a de Polignac number, because none of the positive numbers 2^k-23991026171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23991026771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 648551 + ... + 684543.

It is an arithmetic number, because the mean of its divisors is an integer number (1187226096).

Almost surely, 2^23991026171 is an apocalyptic number.

23991026171 is a deficient number, since it is larger than the sum of its proper divisors (4502400133).

23991026171 is a wasteful number, since it uses less digits than its factorization.

23991026171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36291 (or 36284 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 23991026171 in words is "twenty-three billion, nine hundred ninety-one million, twenty-six thousand, one hundred seventy-one".