25974970308817 has 2 divisors, whose sum is σ = 25974970308818. Its totient is φ = 25974970308816.

The previous prime is 25974970308803. The next prime is 25974970308829. The reversal of 25974970308817 is 71880307947952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24151238900881 + 1823731407936 = 4914391^2 + 1350456^2 .

It is a cyclic number.

It is not a de Polignac number, because 25974970308817 - 2⁷ = 25974970308689 is a prime.

It is not a weakly prime, because it can be changed into another prime (25974970302817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12987485154408 + 12987485154409.

It is an arithmetic number, because the mean of its divisors is an integer number (12987485154409).

Almost surely, 2^{25974970308817} is an apocalyptic number.

It is an amenable number.

25974970308817 is a deficient number, since it is larger than the sum of its proper divisors (1).

25974970308817 is an equidigital number, since it uses as much as digits as its factorization.

25974970308817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 213373440, while the sum is 70.

The spelling of 25974970308817 in words is "twenty-five trillion, nine hundred seventy-four billion, nine hundred seventy million, three hundred eight thousand, eight hundred seventeen".