23909399559 has 8 divisors (see below), whose sum is σ = 35421332720. Its totient is φ = 15939599688.

The previous prime is 23909399551. The next prime is 23909399561. The reversal of 23909399559 is 95599390932.

23909399559 is a `hidden beast` number, since 239 + 0 + 9 + 399 + 5 + 5 + 9 = 666.

It is not a de Polignac number, because 23909399559 - 2³ = 23909399551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23909399496 and 23909399505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23909399551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442766632 + ... + 442766685.

It is an arithmetic number, because the mean of its divisors is an integer number (4427666590).

Almost surely, 2^23909399559 is an apocalyptic number.

23909399559 is a deficient number, since it is larger than the sum of its proper divisors (11511933161).

23909399559 is an equidigital number, since it uses as much as digits as its factorization.

23909399559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885533326 (or 885533320 counting only the distinct ones).

The product of its (nonzero) digits is 26572050, while the sum is 63.

The spelling of 23909399559 in words is "twenty-three billion, nine hundred nine million, three hundred ninety-nine thousand, five hundred fifty-nine".