25478556170927 has 2 divisors, whose sum is σ = 25478556170928. Its totient is φ = 25478556170926.

The previous prime is 25478556170891. The next prime is 25478556170953. The reversal of 25478556170927 is 72907165587452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25478556170927 - 2⁶ = 25478556170863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25478556100927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12739278085463 + 12739278085464.

It is an arithmetic number, because the mean of its divisors is an integer number (12739278085464).

Almost surely, 2^{25478556170927} is an apocalyptic number.

25478556170927 is a deficient number, since it is larger than the sum of its proper divisors (1).

25478556170927 is an equidigital number, since it uses as much as digits as its factorization.

25478556170927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352000, while the sum is 68.

The spelling of 25478556170927 in words is "twenty-five trillion, four hundred seventy-eight billion, five hundred fifty-six million, one hundred seventy thousand, nine hundred twenty-seven".