25973156317 has 2 divisors, whose sum is σ = 25973156318. Its totient is φ = 25973156316.

The previous prime is 25973156311. The next prime is 25973156449. The reversal of 25973156317 is 71365137952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19081001956 + 6892154361 = 138134^2 + 83019^2 .

It is a cyclic number.

It is not a de Polignac number, because 25973156317 - 2²⁷ = 25838938589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25973156311) 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, 12986578158 + 12986578159.

It is an arithmetic number, because the mean of its divisors is an integer number (12986578159).

Almost surely, 2^25973156317 is an apocalyptic number.

It is an amenable number.

25973156317 is a deficient number, since it is larger than the sum of its proper divisors (1).

25973156317 is an equidigital number, since it uses as much as digits as its factorization.

25973156317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1190700, while the sum is 49.

The spelling of 25973156317 in words is "twenty-five billion, nine hundred seventy-three million, one hundred fifty-six thousand, three hundred seventeen".