2491259635 has 4 divisors (see below), whose sum is σ = 2989511568. Its totient is φ = 1993007704.

The previous prime is 2491259629. The next prime is 2491259663. The reversal of 2491259635 is 5369521942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2491259635 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249125959 + ... + 249125968.

It is an arithmetic number, because the mean of its divisors is an integer number (747377892).

Almost surely, 2^2491259635 is an apocalyptic number.

2491259635 is a deficient number, since it is larger than the sum of its proper divisors (498251933).

2491259635 is an equidigital number, since it uses as much as digits as its factorization.

2491259635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498251932.

The product of its digits is 583200, while the sum is 46.

The square root of 2491259635 is about 49912.5198221849. The cubic root of 2491259635 is about 1355.6252947476.

The spelling of 2491259635 in words is "two billion, four hundred ninety-one million, two hundred fifty-nine thousand, six hundred thirty-five".