25385438713 has 4 divisors (see below), whose sum is σ = 25801593508. Its totient is φ = 24969283920.

The previous prime is 25385438671. The next prime is 25385438719. The reversal of 25385438713 is 31783458352.

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 978250729 + 24407187984 = 31277^2 + 156228^2 .

It is a cyclic number.

It is not a de Polignac number, because 25385438713 - 2¹⁷ = 25385307641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25385438719) 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, 208077306 + ... + 208077427.

It is an arithmetic number, because the mean of its divisors is an integer number (6450398377).

Almost surely, 2^25385438713 is an apocalyptic number.

It is an amenable number.

25385438713 is a deficient number, since it is larger than the sum of its proper divisors (416154795).

25385438713 is an equidigital number, since it uses as much as digits as its factorization.

25385438713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416154794.

The product of its digits is 2419200, while the sum is 49.

The spelling of 25385438713 in words is "twenty-five billion, three hundred eighty-five million, four hundred thirty-eight thousand, seven hundred thirteen".