25257412361 has 2 divisors, whose sum is σ = 25257412362. Its totient is φ = 25257412360.

The previous prime is 25257412357. The next prime is 25257412429. The reversal of 25257412361 is 16321475252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17974496761 + 7282915600 = 134069^2 + 85340^2 .

It is a cyclic number.

It is not a de Polignac number, because 25257412361 - 2² = 25257412357 is a prime.

It is not a weakly prime, because it can be changed into another prime (25257412321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12628706180 + 12628706181.

It is an arithmetic number, because the mean of its divisors is an integer number (12628706181).

Almost surely, 2^25257412361 is an apocalyptic number.

It is an amenable number.

25257412361 is a deficient number, since it is larger than the sum of its proper divisors (1).

25257412361 is an equidigital number, since it uses as much as digits as its factorization.

25257412361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The spelling of 25257412361 in words is "twenty-five billion, two hundred fifty-seven million, four hundred twelve thousand, three hundred sixty-one".