23543166134591 has 2 divisors, whose sum is σ = 23543166134592. Its totient is φ = 23543166134590.

The previous prime is 23543166134513. The next prime is 23543166134599. The reversal of 23543166134591 is 19543166134532.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23543166134591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23543166134599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11771583067295 + 11771583067296.

It is an arithmetic number, because the mean of its divisors is an integer number (11771583067296).

Almost surely, 2^{23543166134591} is an apocalyptic number.

23543166134591 is a deficient number, since it is larger than the sum of its proper divisors (1).

23543166134591 is an equidigital number, since it uses as much as digits as its factorization.

23543166134591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6998400, while the sum is 53.

The spelling of 23543166134591 in words is "twenty-three trillion, five hundred forty-three billion, one hundred sixty-six million, one hundred thirty-four thousand, five hundred ninety-one".