23681637009 has 10 divisors (see below), whose sum is σ = 35376272690. Its totient is φ = 15787757952.

The previous prime is 23681636969. The next prime is 23681637011. The reversal of 23681637009 is 90073618632.

23681637009 is a `hidden beast` number, since 2 + 3 + 6 + 8 + 1 + 637 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21764510784 + 1917126225 = 147528^2 + 43785^2 .

It is not a de Polignac number, because 23681637009 - 2²⁹ = 23144766097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23681637019) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 146182864 + ... + 146183025.

It is an arithmetic number, because the mean of its divisors is an integer number (3537627269).

Almost surely, 2^23681637009 is an apocalyptic number.

It is an amenable number.

23681637009 is a deficient number, since it is larger than the sum of its proper divisors (11694635681).

23681637009 is an equidigital number, since it uses as much as digits as its factorization.

23681637009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292365901 (or 292365892 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 23681637009 in words is "twenty-three billion, six hundred eighty-one million, six hundred thirty-seven thousand, nine".