23315561641 has 2 divisors, whose sum is σ = 23315561642. Its totient is φ = 23315561640.

The previous prime is 23315561627. The next prime is 23315561651. The reversal of 23315561641 is 14616551332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15867181225 + 7448380416 = 125965^2 + 86304^2 .

It is a cyclic number.

It is not a de Polignac number, because 23315561641 - 2¹⁷ = 23315430569 is a prime.

It is a super-2 number, since 2×23315561641² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23315561641.

It is not a weakly prime, because it can be changed into another prime (23315561651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11657780820 + 11657780821.

It is an arithmetic number, because the mean of its divisors is an integer number (11657780821).

Almost surely, 2^23315561641 is an apocalyptic number.

It is an amenable number.

23315561641 is a deficient number, since it is larger than the sum of its proper divisors (1).

23315561641 is an equidigital number, since it uses as much as digits as its factorization.

23315561641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The spelling of 23315561641 in words is "twenty-three billion, three hundred fifteen million, five hundred sixty-one thousand, six hundred forty-one".