25896158985 has 16 divisors (see below), whose sum is σ = 41437705536. Its totient is φ = 13810001088.

The previous prime is 25896158933. The next prime is 25896159001. The reversal of 25896158985 is 58985169852.

It is a de Polignac number, because none of the positive numbers 2^k-25896158985 is a prime.

It is a super-2 number, since 2×25896158985² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99522 + ... + 248388.

It is an arithmetic number, because the mean of its divisors is an integer number (2589856596).

Almost surely, 2^25896158985 is an apocalyptic number.

It is an amenable number.

25896158985 is a deficient number, since it is larger than the sum of its proper divisors (15541546551).

25896158985 is a wasteful number, since it uses less digits than its factorization.

25896158985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160472.

The product of its digits is 62208000, while the sum is 66.

The spelling of 25896158985 in words is "twenty-five billion, eight hundred ninety-six million, one hundred fifty-eight thousand, nine hundred eighty-five".