23556475643 has 2 divisors, whose sum is σ = 23556475644. Its totient is φ = 23556475642.

The previous prime is 23556475619. The next prime is 23556475661. The reversal of 23556475643 is 34657465532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23556475643 - 2¹⁰ = 23556474619 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 23556475591 and 23556475600.

It is not a weakly prime, because it can be changed into another prime (23556475673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11778237821 + 11778237822.

It is an arithmetic number, because the mean of its divisors is an integer number (11778237822).

Almost surely, 2^23556475643 is an apocalyptic number.

23556475643 is a deficient number, since it is larger than the sum of its proper divisors (1).

23556475643 is an equidigital number, since it uses as much as digits as its factorization.

23556475643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 50.

The spelling of 23556475643 in words is "twenty-three billion, five hundred fifty-six million, four hundred seventy-five thousand, six hundred forty-three".