23565661464 has 32 divisors (see below), whose sum is σ = 60945678000. Its totient is φ = 7584350592.

The previous prime is 23565661447. The next prime is 23565661507. The reversal of 23565661464 is 46416656532.

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, 16928659 + ... + 16930050.

Almost surely, 2^23565661464 is an apocalyptic number.

23565661464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

23565661464 is an abundant number, since it is smaller than the sum of its proper divisors (37380016536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23565661464 is a wasteful number, since it uses less digits than its factorization.

23565661464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33858747 (or 33858743 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 48.

The spelling of 23565661464 in words is "twenty-three billion, five hundred sixty-five million, six hundred sixty-one thousand, four hundred sixty-four".