25968475913 has 2 divisors, whose sum is σ = 25968475914. Its totient is φ = 25968475912.

The previous prime is 25968475909. The next prime is 25968475943. The reversal of 25968475913 is 31957486952.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24703037584 + 1265438329 = 157172^2 + 35573^2 .

It is a cyclic number.

It is not a de Polignac number, because 25968475913 - 2² = 25968475909 is a prime.

It is a super-2 number, since 2×25968475913² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25968475943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12984237956 + 12984237957.

It is an arithmetic number, because the mean of its divisors is an integer number (12984237957).

Almost surely, 2^25968475913 is an apocalyptic number.

It is an amenable number.

25968475913 is a deficient number, since it is larger than the sum of its proper divisors (1).

25968475913 is an equidigital number, since it uses as much as digits as its factorization.

25968475913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 59.

The spelling of 25968475913 in words is "twenty-five billion, nine hundred sixty-eight million, four hundred seventy-five thousand, nine hundred thirteen".