25131012887 has 2 divisors, whose sum is σ = 25131012888. Its totient is φ = 25131012886.

The previous prime is 25131012871. The next prime is 25131012953. The reversal of 25131012887 is 78821013152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25131012887 - 2⁴ = 25131012871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25131012887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25131912887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565506443 + 12565506444.

It is an arithmetic number, because the mean of its divisors is an integer number (12565506444).

Almost surely, 2^25131012887 is an apocalyptic number.

25131012887 is a deficient number, since it is larger than the sum of its proper divisors (1).

25131012887 is an equidigital number, since it uses as much as digits as its factorization.

25131012887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 25131012887 in words is "twenty-five billion, one hundred thirty-one million, twelve thousand, eight hundred eighty-seven".