25712052557 has 2 divisors, whose sum is σ = 25712052558. Its totient is φ = 25712052556.

The previous prime is 25712052517. The next prime is 25712052631. The reversal of 25712052557 is 75525021752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19368567241 + 6343485316 = 139171^2 + 79646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25712052557 is a prime.

It is a super-2 number, since 2×25712052557² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25712052517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12856026278 + 12856026279.

It is an arithmetic number, because the mean of its divisors is an integer number (12856026279).

Almost surely, 2^25712052557 is an apocalyptic number.

It is an amenable number.

25712052557 is a deficient number, since it is larger than the sum of its proper divisors (1).

25712052557 is an equidigital number, since it uses as much as digits as its factorization.

25712052557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 245000, while the sum is 41.

The spelling of 25712052557 in words is "twenty-five billion, seven hundred twelve million, fifty-two thousand, five hundred fifty-seven".