25355931313 has 8 divisors (see below), whose sum is σ = 25398045288. Its totient is φ = 25313842944.

The previous prime is 25355931301. The next prime is 25355931353. The reversal of 25355931313 is 31313955352.

It can be written as a sum of positive squares in 4 ways, for example, as 90193009 + 25265738304 = 9497^2 + 158952^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25355931313 - 2²⁵ = 25322376881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25355931353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3224895 + ... + 3232747.

It is an arithmetic number, because the mean of its divisors is an integer number (3174755661).

Almost surely, 2^25355931313 is an apocalyptic number.

It is an amenable number.

25355931313 is a deficient number, since it is larger than the sum of its proper divisors (42113975).

25355931313 is an equidigital number, since it uses as much as digits as its factorization.

25355931313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12803.

The product of its digits is 182250, while the sum is 40.

The spelling of 25355931313 in words is "twenty-five billion, three hundred fifty-five million, nine hundred thirty-one thousand, three hundred thirteen".