25490766793 has 2 divisors, whose sum is σ = 25490766794. Its totient is φ = 25490766792.

The previous prime is 25490766787. The next prime is 25490766809. The reversal of 25490766793 is 39766709452.

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., 20594546064 + 4896220729 = 143508^2 + 69973^2 .

It is a cyclic number.

It is not a de Polignac number, because 25490766793 - 2⁹ = 25490766281 is a prime.

It is a super-2 number, since 2×25490766793² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25490766713) 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, 12745383396 + 12745383397.

It is an arithmetic number, because the mean of its divisors is an integer number (12745383397).

Almost surely, 2^25490766793 is an apocalyptic number.

It is an amenable number.

25490766793 is a deficient number, since it is larger than the sum of its proper divisors (1).

25490766793 is an equidigital number, since it uses as much as digits as its factorization.

25490766793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17146080, while the sum is 58.

The spelling of 25490766793 in words is "twenty-five billion, four hundred ninety million, seven hundred sixty-six thousand, seven hundred ninety-three".