25804936779 has 16 divisors (see below), whose sum is σ = 35912858112. Its totient is φ = 16450584128.

The previous prime is 25804936757. The next prime is 25804936783. The reversal of 25804936779 is 97763940852.

It is a cyclic number.

It is not a de Polignac number, because 25804936779 - 2¹⁵ = 25804904011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25804936789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195874 + ... + 299960.

It is an arithmetic number, because the mean of its divisors is an integer number (2244553632).

Almost surely, 2^25804936779 is an apocalyptic number.

25804936779 is a deficient number, since it is larger than the sum of its proper divisors (10107921333).

25804936779 is a wasteful number, since it uses less digits than its factorization.

25804936779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107706.

The product of its (nonzero) digits is 22861440, while the sum is 60.

The spelling of 25804936779 in words is "twenty-five billion, eight hundred four million, nine hundred thirty-six thousand, seven hundred seventy-nine".