25087874437 has 2 divisors, whose sum is σ = 25087874438. Its totient is φ = 25087874436.

The previous prime is 25087874419. The next prime is 25087874443. The reversal of 25087874437 is 73447878052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23691058561 + 1396815876 = 153919^2 + 37374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25087874437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25087874407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12543937218 + 12543937219.

It is an arithmetic number, because the mean of its divisors is an integer number (12543937219).

Almost surely, 2^25087874437 is an apocalyptic number.

It is an amenable number.

25087874437 is a deficient number, since it is larger than the sum of its proper divisors (1).

25087874437 is an equidigital number, since it uses as much as digits as its factorization.

25087874437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10536960, while the sum is 55.

The spelling of 25087874437 in words is "twenty-five billion, eighty-seven million, eight hundred seventy-four thousand, four hundred thirty-seven".