23879509528865 has 4 divisors (see below), whose sum is σ = 28655411434644. Its totient is φ = 19103607623088.

The previous prime is 23879509528837. The next prime is 23879509528883. The reversal of 23879509528865 is 56882590597832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11143525828864 + 12735983700001 = 3338192^2 + 3568751^2 .

It is a cyclic number.

It is not a de Polignac number, because 23879509528865 - 2²² = 23879505334561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2387950952882 + ... + 2387950952891.

It is an arithmetic number, because the mean of its divisors is an integer number (7163852858661).

Almost surely, 2^{23879509528865} is an apocalyptic number.

It is an amenable number.

23879509528865 is a deficient number, since it is larger than the sum of its proper divisors (4775901905779).

23879509528865 is an equidigital number, since it uses as much as digits as its factorization.

23879509528865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775901905778.

The product of its (nonzero) digits is 2612736000, while the sum is 77.

The spelling of 23879509528865 in words is "twenty-three trillion, eight hundred seventy-nine billion, five hundred nine million, five hundred twenty-eight thousand, eight hundred sixty-five".