25292689897 has 2 divisors, whose sum is σ = 25292689898. Its totient is φ = 25292689896.

The previous prime is 25292689883. The next prime is 25292689907. The reversal of 25292689897 is 79898629252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15151394281 + 10141295616 = 123091^2 + 100704^2 .

It is a cyclic number.

It is not a de Polignac number, because 25292689897 - 2²⁷ = 25158472169 is a prime.

It is not a weakly prime, because it can be changed into another prime (25292687897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12646344948 + 12646344949.

It is an arithmetic number, because the mean of its divisors is an integer number (12646344949).

Almost surely, 2^25292689897 is an apocalyptic number.

It is an amenable number.

25292689897 is a deficient number, since it is larger than the sum of its proper divisors (1).

25292689897 is an equidigital number, since it uses as much as digits as its factorization.

25292689897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 67.

The spelling of 25292689897 in words is "twenty-five billion, two hundred ninety-two million, six hundred eighty-nine thousand, eight hundred ninety-seven".