23539858609 has 2 divisors, whose sum is σ = 23539858610. Its totient is φ = 23539858608.

The previous prime is 23539858567. The next prime is 23539858633. The reversal of 23539858609 is 90685893532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22883217984 + 656640625 = 151272^2 + 25625^2 .

It is a cyclic number.

It is not a de Polignac number, because 23539858609 - 2⁷ = 23539858481 is a prime.

It is a super-2 number, since 2×23539858609² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23539858669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11769929304 + 11769929305.

It is an arithmetic number, because the mean of its divisors is an integer number (11769929305).

Almost surely, 2^23539858609 is an apocalyptic number.

It is an amenable number.

23539858609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23539858609 is an equidigital number, since it uses as much as digits as its factorization.

23539858609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13996800, while the sum is 58.

The spelling of 23539858609 in words is "twenty-three billion, five hundred thirty-nine million, eight hundred fifty-eight thousand, six hundred nine".