23735695681 has 8 divisors (see below), whose sum is σ = 25167372840. Its totient is φ = 22307958528.

The previous prime is 23735695673. The next prime is 23735695723. The reversal of 23735695681 is 18659653732.

It can be written as a sum of positive squares in 4 ways, for example, as 2687489281 + 21048206400 = 51841^2 + 145080^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23735695681 - 2³ = 23735695673 is a prime.

It is a super-2 number, since 2×23735695681² (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 (23735695981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972586 + ... + 996691.

It is an arithmetic number, because the mean of its divisors is an integer number (3145921605).

Almost surely, 2^23735695681 is an apocalyptic number.

It is an amenable number.

23735695681 is a deficient number, since it is larger than the sum of its proper divisors (1431677159).

23735695681 is a wasteful number, since it uses less digits than its factorization.

23735695681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970003.

The product of its digits is 8164800, while the sum is 55.

The spelling of 23735695681 in words is "twenty-three billion, seven hundred thirty-five million, six hundred ninety-five thousand, six hundred eighty-one".