25396946593 has 2 divisors, whose sum is σ = 25396946594. Its totient is φ = 25396946592.

The previous prime is 25396946573. The next prime is 25396946609. The reversal of 25396946593 is 39564969352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24375952384 + 1020994209 = 156128^2 + 31953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25396946593 is a prime.

It is not a weakly prime, because it can be changed into another prime (25396946573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12698473296 + 12698473297.

It is an arithmetic number, because the mean of its divisors is an integer number (12698473297).

Almost surely, 2^25396946593 is an apocalyptic number.

It is an amenable number.

25396946593 is a deficient number, since it is larger than the sum of its proper divisors (1).

25396946593 is an equidigital number, since it uses as much as digits as its factorization.

25396946593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47239200, while the sum is 61.

The spelling of 25396946593 in words is "twenty-five billion, three hundred ninety-six million, nine hundred forty-six thousand, five hundred ninety-three".