25356473122819 has 2 divisors, whose sum is σ = 25356473122820. Its totient is φ = 25356473122818.

The previous prime is 25356473122817. The next prime is 25356473122859. The reversal of 25356473122819 is 91822137465352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25356473122819 - 2¹ = 25356473122817 is a prime.

It is a super-2 number, since 2×25356473122819² (a number of 28 digits) contains 22 as substring.

Together with 25356473122817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25356473122817) 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, 12678236561409 + 12678236561410.

It is an arithmetic number, because the mean of its divisors is an integer number (12678236561410).

Almost surely, 2^{25356473122819} is an apocalyptic number.

25356473122819 is a deficient number, since it is larger than the sum of its proper divisors (1).

25356473122819 is an equidigital number, since it uses as much as digits as its factorization.

25356473122819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 58.

The spelling of 25356473122819 in words is "twenty-five trillion, three hundred fifty-six billion, four hundred seventy-three million, one hundred twenty-two thousand, eight hundred nineteen".