25979943507473 has 2 divisors, whose sum is σ = 25979943507474. Its totient is φ = 25979943507472.

The previous prime is 25979943507431. The next prime is 25979943507533. The reversal of 25979943507473 is 37470534997952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23164853488144 + 2815090019329 = 4812988^2 + 1677823^2 .

It is a cyclic number.

It is not a de Polignac number, because 25979943507473 - 2⁶ = 25979943507409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25979943507473.

It is not a weakly prime, because it can be changed into another prime (25979943507403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12989971753736 + 12989971753737.

It is an arithmetic number, because the mean of its divisors is an integer number (12989971753737).

Almost surely, 2^{25979943507473} is an apocalyptic number.

It is an amenable number.

25979943507473 is a deficient number, since it is larger than the sum of its proper divisors (1).

25979943507473 is an equidigital number, since it uses as much as digits as its factorization.

25979943507473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800338400, while the sum is 74.

The spelling of 25979943507473 in words is "twenty-five trillion, nine hundred seventy-nine billion, nine hundred forty-three million, five hundred seven thousand, four hundred seventy-three".