25694879417 has 2 divisors, whose sum is σ = 25694879418. Its totient is φ = 25694879416.

The previous prime is 25694879389. The next prime is 25694879443. The reversal of 25694879417 is 71497849652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22855694761 + 2839184656 = 151181^2 + 53284^2 .

It is a cyclic number.

It is not a de Polignac number, because 25694879417 - 2¹⁰ = 25694878393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25694879417.

It is not a weakly prime, because it can be changed into another prime (25694879467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12847439708 + 12847439709.

It is an arithmetic number, because the mean of its divisors is an integer number (12847439709).

Almost surely, 2^25694879417 is an apocalyptic number.

It is an amenable number.

25694879417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25694879417 is an equidigital number, since it uses as much as digits as its factorization.

25694879417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 62.

The spelling of 25694879417 in words is "twenty-five billion, six hundred ninety-four million, eight hundred seventy-nine thousand, four hundred seventeen".