25940574865 has 16 divisors (see below), whose sum is σ = 31533207552. Its totient is φ = 20484442944.

The previous prime is 25940574851. The next prime is 25940574871. The reversal of 25940574865 is 56847504952.

It is a cyclic number.

It is not a de Polignac number, because 25940574865 - 2²¹ = 25938477713 is a prime.

It is a Duffinian 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, 21412 + ... + 228778.

It is an arithmetic number, because the mean of its divisors is an integer number (1970825472).

Almost surely, 2^25940574865 is an apocalyptic number.

It is an amenable number.

25940574865 is a deficient number, since it is larger than the sum of its proper divisors (5592632687).

25940574865 is a wasteful number, since it uses less digits than its factorization.

25940574865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207696.

The product of its (nonzero) digits is 12096000, while the sum is 55.

The spelling of 25940574865 in words is "twenty-five billion, nine hundred forty million, five hundred seventy-four thousand, eight hundred sixty-five".