23807439661 has 2 divisors, whose sum is σ = 23807439662. Its totient is φ = 23807439660.

The previous prime is 23807439599. The next prime is 23807439767. The reversal of 23807439661 is 16693470832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16594334761 + 7213104900 = 128819^2 + 84930^2 .

It is a cyclic number.

It is not a de Polignac number, because 23807439661 - 2⁷ = 23807439533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23807436661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11903719830 + 11903719831.

It is an arithmetic number, because the mean of its divisors is an integer number (11903719831).

Almost surely, 2^23807439661 is an apocalyptic number.

It is an amenable number.

23807439661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23807439661 is an equidigital number, since it uses as much as digits as its factorization.

23807439661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 23807439661 in words is "twenty-three billion, eight hundred seven million, four hundred thirty-nine thousand, six hundred sixty-one".