23126457191 has 4 divisors (see below), whose sum is σ = 23126882232. Its totient is φ = 23126032152.

The previous prime is 23126457187. The next prime is 23126457199. The reversal of 23126457191 is 19175462132.

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 23126457191 - 2² = 23126457187 is a prime.

It is a super-2 number, since 2×23126457191² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23126457199) 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, 116420 + ... + 244553.

It is an arithmetic number, because the mean of its divisors is an integer number (5781720558).

Almost surely, 2^23126457191 is an apocalyptic number.

23126457191 is a deficient number, since it is larger than the sum of its proper divisors (425041).

23126457191 is an equidigital number, since it uses as much as digits as its factorization.

23126457191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425040.

The product of its digits is 90720, while the sum is 41.

The spelling of 23126457191 in words is "twenty-three billion, one hundred twenty-six million, four hundred fifty-seven thousand, one hundred ninety-one".