23405664616225 has 24 divisors (see below), whose sum is σ = 29646411043968. Its totient is φ = 18322504536000.

The previous prime is 23405664616211. The next prime is 23405664616237. The reversal of 23405664616225 is 52261646650432.

It is not a de Polignac number, because 23405664616225 - 2⁷ = 23405664616097 is a prime.

It is a super-2 number, since 2×23405664616225² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3963067 + ... + 7906783.

It is an arithmetic number, because the mean of its divisors is an integer number (1235267126832).

Almost surely, 2^{23405664616225} is an apocalyptic number.

23405664616225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23405664616225 is a deficient number, since it is larger than the sum of its proper divisors (6240746427743).

23405664616225 is a wasteful number, since it uses less digits than its factorization.

23405664616225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948825 (or 3948820 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 52.

The spelling of 23405664616225 in words is "twenty-three trillion, four hundred five billion, six hundred sixty-four million, six hundred sixteen thousand, two hundred twenty-five".