23642515620666 has 24 divisors (see below), whose sum is σ = 51258435408180. Its totient is φ = 7875763940736.

The previous prime is 23642515620623. The next prime is 23642515620697. The reversal of 23642515620666 is 66602651524632.

It can be written as a sum of positive squares in 2 ways, for example, as 23631061270041 + 11454350625 = 4861179^2 + 107025^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422854561 + ... + 422910468.

Almost surely, 2^{23642515620666} is an apocalyptic number.

23642515620666 is an abundant number, since it is smaller than the sum of its proper divisors (27615919787514).

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

23642515620666 is a wasteful number, since it uses less digits than its factorization.

23642515620666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845766590 (or 845766587 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 54.

The spelling of 23642515620666 in words is "twenty-three trillion, six hundred forty-two billion, five hundred fifteen million, six hundred twenty thousand, six hundred sixty-six".