23945512681 has 4 divisors (see below), whose sum is σ = 24986621952. Its totient is φ = 22904403412.

The previous prime is 23945512667. The next prime is 23945512691. The reversal of 23945512681 is 18621554932.

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 23945512681 - 2⁵ = 23945512649 is a prime.

It is a super-2 number, since 2×23945512681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23945512691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520554601 + ... + 520554646.

It is an arithmetic number, because the mean of its divisors is an integer number (6246655488).

Almost surely, 2^23945512681 is an apocalyptic number.

It is an amenable number.

23945512681 is a deficient number, since it is larger than the sum of its proper divisors (1041109271).

23945512681 is a wasteful number, since it uses less digits than its factorization.

23945512681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041109270.

The product of its digits is 518400, while the sum is 46.

The spelling of 23945512681 in words is "twenty-three billion, nine hundred forty-five million, five hundred twelve thousand, six hundred eighty-one".