25979172893 has 2 divisors, whose sum is σ = 25979172894. Its totient is φ = 25979172892.

The previous prime is 25979172887. The next prime is 25979172899. The reversal of 25979172893 is 39827197952.

It is a balanced prime because it is at equal distance from previous prime (25979172887) and next prime (25979172899).

It can be written as a sum of positive squares in only one way, i.e., 20353872889 + 5625300004 = 142667^2 + 75002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25979172893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25979172899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12989586446 + 12989586447.

It is an arithmetic number, because the mean of its divisors is an integer number (12989586447).

Almost surely, 2^25979172893 is an apocalyptic number.

It is an amenable number.

25979172893 is a deficient number, since it is larger than the sum of its proper divisors (1).

25979172893 is an equidigital number, since it uses as much as digits as its factorization.

25979172893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 62.

The spelling of 25979172893 in words is "twenty-five billion, nine hundred seventy-nine million, one hundred seventy-two thousand, eight hundred ninety-three".