25778157239 has 2 divisors, whose sum is σ = 25778157240. Its totient is φ = 25778157238.

The previous prime is 25778157157. The next prime is 25778157253. The reversal of 25778157239 is 93275187752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25778157239 - 2²⁰ = 25777108663 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25778457239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12889078619 + 12889078620.

It is an arithmetic number, because the mean of its divisors is an integer number (12889078620).

Almost surely, 2^25778157239 is an apocalyptic number.

25778157239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25778157239 is an equidigital number, since it uses as much as digits as its factorization.

25778157239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7408800, while the sum is 56.

The spelling of 25778157239 in words is "twenty-five billion, seven hundred seventy-eight million, one hundred fifty-seven thousand, two hundred thirty-nine".