23912780565 has 8 divisors (see below), whose sum is σ = 38260448928. Its totient is φ = 12753482960.

The previous prime is 23912780561. The next prime is 23912780569. The reversal of 23912780565 is 56508721932.

It is an interprime number because it is at equal distance from previous prime (23912780561) and next prime (23912780569).

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

It is not a de Polignac number, because 23912780565 - 2² = 23912780561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23912780561) 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 7 ways as a sum of consecutive naturals, for example, 797092671 + ... + 797092700.

It is an arithmetic number, because the mean of its divisors is an integer number (4782556116).

Almost surely, 2^23912780565 is an apocalyptic number.

It is an amenable number.

23912780565 is a deficient number, since it is larger than the sum of its proper divisors (14347668363).

23912780565 is a wasteful number, since it uses less digits than its factorization.

23912780565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594185379.

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 23912780565 in words is "twenty-three billion, nine hundred twelve million, seven hundred eighty thousand, five hundred sixty-five".