25944630157 has 2 divisors, whose sum is σ = 25944630158. Its totient is φ = 25944630156.

The previous prime is 25944630149. The next prime is 25944630181. The reversal of 25944630157 is 75103644952.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22314085641 + 3630544516 = 149379^2 + 60254^2 .

It is a cyclic number.

It is not a de Polignac number, because 25944630157 - 2³ = 25944630149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25944630197) 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, 12972315078 + 12972315079.

It is an arithmetic number, because the mean of its divisors is an integer number (12972315079).

Almost surely, 2^25944630157 is an apocalyptic number.

It is an amenable number.

25944630157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25944630157 is an equidigital number, since it uses as much as digits as its factorization.

25944630157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 25944630157 in words is "twenty-five billion, nine hundred forty-four million, six hundred thirty thousand, one hundred fifty-seven".