25555852979 has 2 divisors, whose sum is σ = 25555852980. Its totient is φ = 25555852978.

The previous prime is 25555852937. The next prime is 25555852997. The reversal of 25555852979 is 97925855552.

Together with next prime (25555852997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25555852979 - 2¹² = 25555848883 is a prime.

It is not a weakly prime, because it can be changed into another prime (25551852979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777926489 + 12777926490.

It is an arithmetic number, because the mean of its divisors is an integer number (12777926490).

Almost surely, 2^25555852979 is an apocalyptic number.

25555852979 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555852979 is an equidigital number, since it uses as much as digits as its factorization.

25555852979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700000, while the sum is 62.

The spelling of 25555852979 in words is "twenty-five billion, five hundred fifty-five million, eight hundred fifty-two thousand, nine hundred seventy-nine".