25896158693 has 2 divisors, whose sum is σ = 25896158694. Its totient is φ = 25896158692.

The previous prime is 25896158671. The next prime is 25896158713. The reversal of 25896158693 is 39685169852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21527345284 + 4368813409 = 146722^2 + 66097^2 .

It is a cyclic number.

It is not a de Polignac number, because 25896158693 - 2²⁸ = 25627723237 is a prime.

It is a super-2 number, since 2×25896158693² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25896151693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12948079346 + 12948079347.

It is an arithmetic number, because the mean of its divisors is an integer number (12948079347).

Almost surely, 2^25896158693 is an apocalyptic number.

It is an amenable number.

25896158693 is a deficient number, since it is larger than the sum of its proper divisors (1).

25896158693 is an equidigital number, since it uses as much as digits as its factorization.

25896158693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27993600, while the sum is 62.

The spelling of 25896158693 in words is "twenty-five billion, eight hundred ninety-six million, one hundred fifty-eight thousand, six hundred ninety-three".