23656437173 has 2 divisors, whose sum is σ = 23656437174. Its totient is φ = 23656437172.

The previous prime is 23656437169. The next prime is 23656437221. The reversal of 23656437173 is 37173465632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18324224689 + 5332212484 = 135367^2 + 73022^2 .

It is a cyclic number.

It is not a de Polignac number, because 23656437173 - 2² = 23656437169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23652437173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11828218586 + 11828218587.

It is an arithmetic number, because the mean of its divisors is an integer number (11828218587).

Almost surely, 2^23656437173 is an apocalyptic number.

It is an amenable number.

23656437173 is a deficient number, since it is larger than the sum of its proper divisors (1).

23656437173 is an equidigital number, since it uses as much as digits as its factorization.

23656437173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 47.

The spelling of 23656437173 in words is "twenty-three billion, six hundred fifty-six million, four hundred thirty-seven thousand, one hundred seventy-three".