25995399771 has 16 divisors (see below), whose sum is σ = 40035696768. Its totient is φ = 14828035200.

The previous prime is 25995399767. The next prime is 25995399821. The reversal of 25995399771 is 17799359952.

It is not a de Polignac number, because 25995399771 - 2² = 25995399767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25995399751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23168245 + ... + 23169366.

It is an arithmetic number, because the mean of its divisors is an integer number (2502231048).

Almost surely, 2^25995399771 is an apocalyptic number.

25995399771 is a deficient number, since it is larger than the sum of its proper divisors (14040296997).

25995399771 is a wasteful number, since it uses less digits than its factorization.

25995399771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46337642.

The product of its digits is 48223350, while the sum is 66.

The spelling of 25995399771 in words is "twenty-five billion, nine hundred ninety-five million, three hundred ninety-nine thousand, seven hundred seventy-one".