25195265087 has 2 divisors, whose sum is σ = 25195265088. Its totient is φ = 25195265086.

The previous prime is 25195265083. The next prime is 25195265099. The reversal of 25195265087 is 78056259152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25195265087 - 2² = 25195265083 is a prime.

It is a super-2 number, since 2×25195265087² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25195265083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597632543 + 12597632544.

It is an arithmetic number, because the mean of its divisors is an integer number (12597632544).

Almost surely, 2^25195265087 is an apocalyptic number.

25195265087 is a deficient number, since it is larger than the sum of its proper divisors (1).

25195265087 is an equidigital number, since it uses as much as digits as its factorization.

25195265087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 25195265087 in words is "twenty-five billion, one hundred ninety-five million, two hundred sixty-five thousand, eighty-seven".