25801085085 has 16 divisors (see below), whose sum is σ = 41332783680. Its totient is φ = 13743562880.

The previous prime is 25801085053. The next prime is 25801085099. The reversal of 25801085085 is 58058010852.

It is not a de Polignac number, because 25801085085 - 2⁵ = 25801085053 is a prime.

It is a congruent number.

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, 1050951 + ... + 1075220.

It is an arithmetic number, because the mean of its divisors is an integer number (2583298980).

Almost surely, 2^25801085085 is an apocalyptic number.

It is an amenable number.

25801085085 is a deficient number, since it is larger than the sum of its proper divisors (15531698595).

25801085085 is a wasteful number, since it uses less digits than its factorization.

25801085085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126988.

The product of its (nonzero) digits is 128000, while the sum is 42.

The spelling of 25801085085 in words is "twenty-five billion, eight hundred one million, eighty-five thousand, eighty-five".