25687766085 has 16 divisors (see below), whose sum is σ = 42887401344. Its totient is φ = 13104483392.

The previous prime is 25687766051. The next prime is 25687766101. The reversal of 25687766085 is 58066778652.

It is a cyclic number.

It is not a de Polignac number, because 25687766085 - 2⁹ = 25687765573 is a prime.

It is a super-2 number, since 2×25687766085² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

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, 37228302 + ... + 37228991.

It is an arithmetic number, because the mean of its divisors is an integer number (2680462584).

Almost surely, 2^25687766085 is an apocalyptic number.

It is an amenable number.

25687766085 is a deficient number, since it is larger than the sum of its proper divisors (17199635259).

25687766085 is a wasteful number, since it uses less digits than its factorization.

25687766085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74457324.

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 25687766085 in words is "twenty-five billion, six hundred eighty-seven million, seven hundred sixty-six thousand, eighty-five".