25596738389 has 2 divisors, whose sum is σ = 25596738390. Its totient is φ = 25596738388.

The previous prime is 25596738371. The next prime is 25596738451. The reversal of 25596738389 is 98383769552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24870867025 + 725871364 = 157705^2 + 26942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25596738389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25596738329) 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, 12798369194 + 12798369195.

It is an arithmetic number, because the mean of its divisors is an integer number (12798369195).

Almost surely, 2^25596738389 is an apocalyptic number.

It is an amenable number.

25596738389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25596738389 is an equidigital number, since it uses as much as digits as its factorization.

25596738389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97977600, while the sum is 65.

The spelling of 25596738389 in words is "twenty-five billion, five hundred ninety-six million, seven hundred thirty-eight thousand, three hundred eighty-nine".