25973607917 has 2 divisors, whose sum is σ = 25973607918. Its totient is φ = 25973607916.

The previous prime is 25973607853. The next prime is 25973607967. The reversal of 25973607917 is 71970637952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14726793316 + 11246814601 = 121354^2 + 106051^2 .

It is a cyclic number.

It is not a de Polignac number, because 25973607917 - 2⁶ = 25973607853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25973607967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12986803958 + 12986803959.

It is an arithmetic number, because the mean of its divisors is an integer number (12986803959).

Almost surely, 2^25973607917 is an apocalyptic number.

It is an amenable number.

25973607917 is a deficient number, since it is larger than the sum of its proper divisors (1).

25973607917 is an equidigital number, since it uses as much as digits as its factorization.

25973607917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 25973607917 in words is "twenty-five billion, nine hundred seventy-three million, six hundred seven thousand, nine hundred seventeen".