23451165566 has 16 divisors (see below), whose sum is σ = 35870497488. Its totient is φ = 11494704000.

The previous prime is 23451165553. The next prime is 23451165571. The reversal of 23451165566 is 66556115432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35201 + ... + 219411.

It is an arithmetic number, because the mean of its divisors is an integer number (2241906093).

Almost surely, 2^23451165566 is an apocalyptic number.

23451165566 is a deficient number, since it is larger than the sum of its proper divisors (12419331922).

23451165566 is a wasteful number, since it uses less digits than its factorization.

23451165566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185467.

The product of its digits is 648000, while the sum is 44.

The spelling of 23451165566 in words is "twenty-three billion, four hundred fifty-one million, one hundred sixty-five thousand, five hundred sixty-six".