23515288961 has 4 divisors (see below), whose sum is σ = 23533118400. Its totient is φ = 23497459524.

The previous prime is 23515288903. The next prime is 23515288969. The reversal of 23515288961 is 16988251532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23515288961 - 2¹⁰ = 23515287937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23515288969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8912741 + ... + 8915378.

It is an arithmetic number, because the mean of its divisors is an integer number (5883279600).

Almost surely, 2^23515288961 is an apocalyptic number.

It is an amenable number.

23515288961 is a deficient number, since it is larger than the sum of its proper divisors (17829439).

23515288961 is a wasteful number, since it uses less digits than its factorization.

23515288961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17829438.

The product of its digits is 1036800, while the sum is 50.

The spelling of 23515288961 in words is "twenty-three billion, five hundred fifteen million, two hundred eighty-eight thousand, nine hundred sixty-one".