25639668485 has 16 divisors (see below), whose sum is σ = 32112702720. Its totient is φ = 19615411200.

The previous prime is 25639668469. The next prime is 25639668499. The reversal of 25639668485 is 58486693652.

It is not a de Polignac number, because 25639668485 - 2⁴ = 25639668469 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, 528896 + ... + 575334.

It is an arithmetic number, because the mean of its divisors is an integer number (2007043920).

Almost surely, 2^25639668485 is an apocalyptic number.

It is an amenable number.

25639668485 is a deficient number, since it is larger than the sum of its proper divisors (6473034235).

25639668485 is a wasteful number, since it uses less digits than its factorization.

25639668485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51268.

The product of its digits is 74649600, while the sum is 62.

The spelling of 25639668485 in words is "twenty-five billion, six hundred thirty-nine million, six hundred sixty-eight thousand, four hundred eighty-five".