25193533107857 has 2 divisors, whose sum is σ = 25193533107858. Its totient is φ = 25193533107856.

The previous prime is 25193533107817. The next prime is 25193533107859. The reversal of 25193533107857 is 75870133539152.

It is a Cunningham number, because it is equal to 5019316²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25193533107856 + 1 = 5019316^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 25193533107857 - 2³⁰ = 25192459366033 is a prime.

It is a super-2 number, since 2×25193533107857² (a number of 28 digits) contains 22 as substring.

Together with 25193533107859, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25193533107796 and 25193533107805.

It is not a weakly prime, because it can be changed into another prime (25193533107859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12596766553928 + 12596766553929.

It is an arithmetic number, because the mean of its divisors is an integer number (12596766553929).

Almost surely, 2^{25193533107857} is an apocalyptic number.

It is an amenable number.

25193533107857 is a deficient number, since it is larger than the sum of its proper divisors (1).

25193533107857 is an equidigital number, since it uses as much as digits as its factorization.

25193533107857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814000, while the sum is 59.

The spelling of 25193533107857 in words is "twenty-five trillion, one hundred ninety-three billion, five hundred thirty-three million, one hundred seven thousand, eight hundred fifty-seven".