25115649287 has 2 divisors, whose sum is σ = 25115649288. Its totient is φ = 25115649286.

The previous prime is 25115649217. The next prime is 25115649311. The reversal of 25115649287 is 78294651152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25115649287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25115649217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557824643 + 12557824644.

It is an arithmetic number, because the mean of its divisors is an integer number (12557824644).

Almost surely, 2^25115649287 is an apocalyptic number.

25115649287 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115649287 is an equidigital number, since it uses as much as digits as its factorization.

25115649287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The spelling of 25115649287 in words is "twenty-five billion, one hundred fifteen million, six hundred forty-nine thousand, two hundred eighty-seven".