25426490779 has 2 divisors, whose sum is σ = 25426490780. Its totient is φ = 25426490778.

The previous prime is 25426490717. The next prime is 25426490801. The reversal of 25426490779 is 97709462452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25426490779 - 2⁹ = 25426490267 is a prime.

It is not a weakly prime, because it can be changed into another prime (25426490279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12713245389 + 12713245390.

It is an arithmetic number, because the mean of its divisors is an integer number (12713245390).

Almost surely, 2^25426490779 is an apocalyptic number.

25426490779 is a deficient number, since it is larger than the sum of its proper divisors (1).

25426490779 is an equidigital number, since it uses as much as digits as its factorization.

25426490779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 25426490779 in words is "twenty-five billion, four hundred twenty-six million, four hundred ninety thousand, seven hundred seventy-nine".