25253179817 has 2 divisors, whose sum is σ = 25253179818. Its totient is φ = 25253179816.

The previous prime is 25253179789. The next prime is 25253179849. The reversal of 25253179817 is 71897135252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24748323856 + 504855961 = 157316^2 + 22469^2 .

It is a cyclic number.

It is not a de Polignac number, because 25253179817 - 2⁸ = 25253179561 is a prime.

It is not a weakly prime, because it can be changed into another prime (25253179877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12626589908 + 12626589909.

It is an arithmetic number, because the mean of its divisors is an integer number (12626589909).

Almost surely, 2^25253179817 is an apocalyptic number.

It is an amenable number.

25253179817 is a deficient number, since it is larger than the sum of its proper divisors (1).

25253179817 is an equidigital number, since it uses as much as digits as its factorization.

25253179817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 50.

The spelling of 25253179817 in words is "twenty-five billion, two hundred fifty-three million, one hundred seventy-nine thousand, eight hundred seventeen".