25957307885 has 4 divisors (see below), whose sum is σ = 31148769468. Its totient is φ = 20765846304.

The previous prime is 25957307863. The next prime is 25957307891. The reversal of 25957307885 is 58870375952.

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 14495678404 + 11461629481 = 120398^2 + 107059^2 .

It is a cyclic number.

It is not a de Polignac number, because 25957307885 - 2⁶ = 25957307821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2595730784 + ... + 2595730793.

It is an arithmetic number, because the mean of its divisors is an integer number (7787192367).

Almost surely, 2^25957307885 is an apocalyptic number.

It is an amenable number.

25957307885 is a deficient number, since it is larger than the sum of its proper divisors (5191461583).

25957307885 is an equidigital number, since it uses as much as digits as its factorization.

25957307885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191461582.

The product of its (nonzero) digits is 21168000, while the sum is 59.

The spelling of 25957307885 in words is "twenty-five billion, nine hundred fifty-seven million, three hundred seven thousand, eight hundred eighty-five".