23715193491 has 24 divisors (see below), whose sum is σ = 37732221696. Its totient is φ = 14233296240.

The previous prime is 23715193423. The next prime is 23715193529. The reversal of 23715193491 is 19439151732.

23715193491 is a `hidden beast` number, since 2 + 3 + 7 + 151 + 9 + 3 + 491 = 666.

It is not a de Polignac number, because 23715193491 - 2⁹ = 23715192979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23715193421) 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, 1152655 + ... + 1173048.

It is an arithmetic number, because the mean of its divisors is an integer number (1572175904).

Almost surely, 2^23715193491 is an apocalyptic number.

23715193491 is a deficient number, since it is larger than the sum of its proper divisors (14017028205).

23715193491 is a wasteful number, since it uses less digits than its factorization.

23715193491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325823 (or 2325820 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The spelling of 23715193491 in words is "twenty-three billion, seven hundred fifteen million, one hundred ninety-three thousand, four hundred ninety-one".