25827470897 has 2 divisors, whose sum is σ = 25827470898. Its totient is φ = 25827470896.

The previous prime is 25827470839. The next prime is 25827470899. The reversal of 25827470897 is 79807472852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18558885361 + 7268585536 = 136231^2 + 85256^2 .

It is a cyclic number.

It is not a de Polignac number, because 25827470897 - 2³⁴ = 8647601713 is a prime.

Together with 25827470899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25827470899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12913735448 + 12913735449.

It is an arithmetic number, because the mean of its divisors is an integer number (12913735449).

Almost surely, 2^25827470897 is an apocalyptic number.

It is an amenable number.

25827470897 is a deficient number, since it is larger than the sum of its proper divisors (1).

25827470897 is an equidigital number, since it uses as much as digits as its factorization.

25827470897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15805440, while the sum is 59.

The spelling of 25827470897 in words is "twenty-five billion, eight hundred twenty-seven million, four hundred seventy thousand, eight hundred ninety-seven".