25506116297 has 2 divisors, whose sum is σ = 25506116298. Its totient is φ = 25506116296.

The previous prime is 25506116203. The next prime is 25506116393. The reversal of 25506116297 is 79261160552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14481956281 + 11024160016 = 120341^2 + 104996^2 .

It is a cyclic number.

It is not a de Polignac number, because 25506116297 - 2²² = 25501921993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25506116197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753058148 + 12753058149.

It is an arithmetic number, because the mean of its divisors is an integer number (12753058149).

Almost surely, 2^25506116297 is an apocalyptic number.

It is an amenable number.

25506116297 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506116297 is an equidigital number, since it uses as much as digits as its factorization.

25506116297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 25506116297 in words is "twenty-five billion, five hundred six million, one hundred sixteen thousand, two hundred ninety-seven".