25127920345439 has 2 divisors, whose sum is σ = 25127920345440. Its totient is φ = 25127920345438.

The previous prime is 25127920345397. The next prime is 25127920345441. The reversal of 25127920345439 is 93454302972152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25127920345439 - 2²⁰ = 25127919296863 is a prime.

Together with 25127920345441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25127920345459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12563960172719 + 12563960172720.

It is an arithmetic number, because the mean of its divisors is an integer number (12563960172720).

Almost surely, 2^{25127920345439} is an apocalyptic number.

25127920345439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25127920345439 is an equidigital number, since it uses as much as digits as its factorization.

25127920345439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 25127920345439 in words is "twenty-five trillion, one hundred twenty-seven billion, nine hundred twenty million, three hundred forty-five thousand, four hundred thirty-nine".