23665656616 has 192 divisors, whose sum is σ = 58019068800. Its totient is φ = 8972587008.

The previous prime is 23665656613. The next prime is 23665656709. The reversal of 23665656616 is 61665656632.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (23665656611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9041740 + ... + 9044356.

It is an arithmetic number, because the mean of its divisors is an integer number (302182650).

Almost surely, 2^23665656616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23665656616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29009534400).

23665656616 is an abundant number, since it is smaller than the sum of its proper divisors (34353412184).

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

23665656616 is a wasteful number, since it uses less digits than its factorization.

23665656616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736 (or 2725 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 52.

The spelling of 23665656616 in words is "twenty-three billion, six hundred sixty-five million, six hundred fifty-six thousand, six hundred sixteen".