25113781439 has 2 divisors, whose sum is σ = 25113781440. Its totient is φ = 25113781438.

The previous prime is 25113781379. The next prime is 25113781513. The reversal of 25113781439 is 93418731152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25113781439 - 2²⁸ = 24845345983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25113781439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25113781139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12556890719 + 12556890720.

It is an arithmetic number, because the mean of its divisors is an integer number (12556890720).

Almost surely, 2^25113781439 is an apocalyptic number.

25113781439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25113781439 is an equidigital number, since it uses as much as digits as its factorization.

25113781439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The spelling of 25113781439 in words is "twenty-five billion, one hundred thirteen million, seven hundred eighty-one thousand, four hundred thirty-nine".