25803553157 has 2 divisors, whose sum is σ = 25803553158. Its totient is φ = 25803553156.

The previous prime is 25803553093. The next prime is 25803553177. The reversal of 25803553157 is 75135530852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20196388996 + 5607164161 = 142114^2 + 74881^2 .

It is a cyclic number.

It is not a de Polignac number, because 25803553157 - 2⁶ = 25803553093 is a prime.

It is a super-2 number, since 2×25803553157² (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 (25803553177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12901776578 + 12901776579.

It is an arithmetic number, because the mean of its divisors is an integer number (12901776579).

Almost surely, 2^25803553157 is an apocalyptic number.

It is an amenable number.

25803553157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25803553157 is an equidigital number, since it uses as much as digits as its factorization.

25803553157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 25803553157 in words is "twenty-five billion, eight hundred three million, five hundred fifty-three thousand, one hundred fifty-seven".