25719663839 has 2 divisors, whose sum is σ = 25719663840. Its totient is φ = 25719663838.

The previous prime is 25719663799. The next prime is 25719663859. The reversal of 25719663839 is 93836691752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25719663839 - 2⁸ = 25719663583 is a prime.

It is a super-2 number, since 2×25719663839² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25719663859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859831919 + 12859831920.

It is an arithmetic number, because the mean of its divisors is an integer number (12859831920).

Almost surely, 2^25719663839 is an apocalyptic number.

25719663839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25719663839 is an equidigital number, since it uses as much as digits as its factorization.

25719663839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 59.

The spelling of 25719663839 in words is "twenty-five billion, seven hundred nineteen million, six hundred sixty-three thousand, eight hundred thirty-nine".