23521565642 has 8 divisors (see below), whose sum is σ = 36420488832. Its totient is φ = 11381402700.

The previous prime is 23521565591. The next prime is 23521565701. The reversal of 23521565642 is 24656512532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23521565642.

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 3 ways as a sum of consecutive naturals, for example, 189689984 + ... + 189690107.

It is an arithmetic number, because the mean of its divisors is an integer number (4552561104).

Almost surely, 2^23521565642 is an apocalyptic number.

23521565642 is a deficient number, since it is larger than the sum of its proper divisors (12898923190).

23521565642 is a wasteful number, since it uses less digits than its factorization.

23521565642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379380124.

The product of its digits is 432000, while the sum is 41.

The spelling of 23521565642 in words is "twenty-three billion, five hundred twenty-one million, five hundred sixty-five thousand, six hundred forty-two".