25194116791289 has 2 divisors, whose sum is σ = 25194116791290. Its totient is φ = 25194116791288.

The previous prime is 25194116791247. The next prime is 25194116791321. The reversal of 25194116791289 is 98219761149152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18576401701225 + 6617715090064 = 4310035^2 + 2572492^2 .

It is a cyclic number.

It is not a de Polignac number, because 25194116791289 - 2⁸ = 25194116791033 is a prime.

It is a super-2 number, since 2×25194116791289² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25194116791189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597058395644 + 12597058395645.

It is an arithmetic number, because the mean of its divisors is an integer number (12597058395645).

Almost surely, 2^{25194116791289} is an apocalyptic number.

It is an amenable number.

25194116791289 is a deficient number, since it is larger than the sum of its proper divisors (1).

25194116791289 is an equidigital number, since it uses as much as digits as its factorization.

25194116791289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 65.

The spelling of 25194116791289 in words is "twenty-five trillion, one hundred ninety-four billion, one hundred sixteen million, seven hundred ninety-one thousand, two hundred eighty-nine".