23166498491 has 2 divisors, whose sum is σ = 23166498492. Its totient is φ = 23166498490.

The previous prime is 23166498409. The next prime is 23166498499. The reversal of 23166498491 is 19489466132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23166498491 - 2¹⁴ = 23166482107 is a prime.

It is not a weakly prime, because it can be changed into another prime (23166498499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11583249245 + 11583249246.

It is an arithmetic number, because the mean of its divisors is an integer number (11583249246).

Almost surely, 2^23166498491 is an apocalyptic number.

23166498491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23166498491 is an equidigital number, since it uses as much as digits as its factorization.

23166498491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The spelling of 23166498491 in words is "twenty-three billion, one hundred sixty-six million, four hundred ninety-eight thousand, four hundred ninety-one".