25682560439 has 2 divisors, whose sum is σ = 25682560440. Its totient is φ = 25682560438.

The previous prime is 25682560381. The next prime is 25682560469. The reversal of 25682560439 is 93406528652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25682560439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25682560469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12841280219 + 12841280220.

It is an arithmetic number, because the mean of its divisors is an integer number (12841280220).

Almost surely, 2^25682560439 is an apocalyptic number.

25682560439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25682560439 is an equidigital number, since it uses as much as digits as its factorization.

25682560439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 25682560439 in words is "twenty-five billion, six hundred eighty-two million, five hundred sixty thousand, four hundred thirty-nine".