23731112788681 has 3 divisors (see below), whose sum is σ = 23731117660141. Its totient is φ = 23731107917222.

The previous prime is 23731112788679. The next prime is 23731112788777. The reversal of 23731112788681 is 18688721113732.

It is a happy number.

The square root of 23731112788681 is 4871459.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 23731112788681 - 2¹ = 23731112788679 is a prime.

It is a super-2 number, since 2×23731112788681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23731112788601) 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 2 ways as a sum of consecutive naturals, for example, 2435730 + ... + 7307188.

Almost surely, 2^{23731112788681} is an apocalyptic number.

23731112788681 is the 4871459-th square number.

23731112788681 is the 2435730-th centered octagonal number.

It is an amenable number.

23731112788681 is a deficient number, since it is larger than the sum of its proper divisors (4871460).

23731112788681 is an frugal number, since it uses more digits than its factorization.

23731112788681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9742918 (or 4871459 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 58.

The spelling of 23731112788681 in words is "twenty-three trillion, seven hundred thirty-one billion, one hundred twelve million, seven hundred eighty-eight thousand, six hundred eighty-one".