23646640625 has 32 divisors (see below), whose sum is σ = 30249922560. Its totient is φ = 18474750000.

The previous prime is 23646640597. The next prime is 23646640631. The reversal of 23646640625 is 52604664632.

It is not a de Polignac number, because 23646640625 - 2¹² = 23646636529 is a prime.

It is a super-2 number, since 2×23646640625² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3355856 + ... + 3362894.

It is an arithmetic number, because the mean of its divisors is an integer number (945310080).

Almost surely, 2^23646640625 is an apocalyptic number.

23646640625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23646640625 is a deficient number, since it is larger than the sum of its proper divisors (6603281935).

23646640625 is an frugal number, since it uses more digits than its factorization.

23646640625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7117 (or 7087 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 23646640625 in words is "twenty-three billion, six hundred forty-six million, six hundred forty thousand, six hundred twenty-five".