25839974593 has 4 divisors (see below), whose sum is σ = 25952813140. Its totient is φ = 25727136048.

The previous prime is 25839974591. The next prime is 25839974599. The reversal of 25839974593 is 39547993852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20964723264 + 4875251329 = 144792^2 + 69823^2 .

It is a cyclic number.

It is not a de Polignac number, because 25839974593 - 2¹ = 25839974591 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25839974591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56418930 + ... + 56419387.

It is an arithmetic number, because the mean of its divisors is an integer number (6488203285).

Almost surely, 2^25839974593 is an apocalyptic number.

It is an amenable number.

25839974593 is a deficient number, since it is larger than the sum of its proper divisors (112838547).

25839974593 is a wasteful number, since it uses less digits than its factorization.

25839974593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112838546.

The product of its digits is 73483200, while the sum is 64.

The spelling of 25839974593 in words is "twenty-five billion, eight hundred thirty-nine million, nine hundred seventy-four thousand, five hundred ninety-three".