25025426693 has 2 divisors, whose sum is σ = 25025426694. Its totient is φ = 25025426692.

The previous prime is 25025426653. The next prime is 25025426707. The reversal of 25025426693 is 39662452052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24038021764 + 987404929 = 155042^2 + 31423^2 .

It is a cyclic number.

It is not a de Polignac number, because 25025426693 - 2³² = 20730459397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25025426653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12512713346 + 12512713347.

It is an arithmetic number, because the mean of its divisors is an integer number (12512713347).

Almost surely, 2^25025426693 is an apocalyptic number.

It is an amenable number.

25025426693 is a deficient number, since it is larger than the sum of its proper divisors (1).

25025426693 is an equidigital number, since it uses as much as digits as its factorization.

25025426693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 25025426693 in words is "twenty-five billion, twenty-five million, four hundred twenty-six thousand, six hundred ninety-three".