23155869713985 has 24 divisors (see below), whose sum is σ = 40137023832360. Its totient is φ = 12349740874752.

The previous prime is 23155869713981. The next prime is 23155869714071. The reversal of 23155869713985 is 58931796855132.

23155869713985 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 586 + 9 + 7 + 1 + 39 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3435236126721 + 19720633587264 = 1853439^2 + 4440792^2 .

It is not a de Polignac number, because 23155869713985 - 2² = 23155869713981 is a prime.

It is a super-2 number, since 2×23155869713985² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23155869713981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9969771 + ... + 12070959.

It is an arithmetic number, because the mean of its divisors is an integer number (1672375993015).

Almost surely, 2^{23155869713985} is an apocalyptic number.

It is an amenable number.

23155869713985 is a deficient number, since it is larger than the sum of its proper divisors (16981154118375).

23155869713985 is a wasteful number, since it uses less digits than its factorization.

23155869713985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346097 (or 2346094 counting only the distinct ones).

The product of its digits is 489888000, while the sum is 72.

The spelling of 23155869713985 in words is "twenty-three trillion, one hundred fifty-five billion, eight hundred sixty-nine million, seven hundred thirteen thousand, nine hundred eighty-five".