25856977607 has 2 divisors, whose sum is σ = 25856977608. Its totient is φ = 25856977606.

The previous prime is 25856977541. The next prime is 25856977609. The reversal of 25856977607 is 70677965852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25856977607 - 2⁸ = 25856977351 is a prime.

Together with 25856977609, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25856977607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25856977609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12928488803 + 12928488804.

It is an arithmetic number, because the mean of its divisors is an integer number (12928488804).

Almost surely, 2^25856977607 is an apocalyptic number.

25856977607 is a deficient number, since it is larger than the sum of its proper divisors (1).

25856977607 is an equidigital number, since it uses as much as digits as its factorization.

25856977607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44452800, while the sum is 62.

The spelling of 25856977607 in words is "twenty-five billion, eight hundred fifty-six million, nine hundred seventy-seven thousand, six hundred seven".