25494468249637 has 2 divisors, whose sum is σ = 25494468249638. Its totient is φ = 25494468249636.

The previous prime is 25494468249563. The next prime is 25494468249667. The reversal of 25494468249637 is 73694286449452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22765360945636 + 2729107304001 = 4771306^2 + 1652001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25494468249637 is a prime.

It is a super-2 number, since 2×25494468249637² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25494468249637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25494468249667) 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, 12747234124818 + 12747234124819.

It is an arithmetic number, because the mean of its divisors is an integer number (12747234124819).

Almost surely, 2^{25494468249637} is an apocalyptic number.

It is an amenable number.

25494468249637 is a deficient number, since it is larger than the sum of its proper divisors (1).

25494468249637 is an equidigital number, since it uses as much as digits as its factorization.

25494468249637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2508226560, while the sum is 73.

The spelling of 25494468249637 in words is "twenty-five trillion, four hundred ninety-four billion, four hundred sixty-eight million, two hundred forty-nine thousand, six hundred thirty-seven".