2491409688 has 16 divisors (see below), whose sum is σ = 6228524280. Its totient is φ = 830469888.

The previous prime is 2491409677. The next prime is 2491409741. The reversal of 2491409688 is 8869041942.

It is a self number, because there is not a number n which added to its sum of digits gives 2491409688.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 51904345 + ... + 51904392.

Almost surely, 2^2491409688 is an apocalyptic number.

It is an amenable number.

2491409688 is an abundant number, since it is smaller than the sum of its proper divisors (3737114592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2491409688 is a wasteful number, since it uses less digits than its factorization.

2491409688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103808746 (or 103808742 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The square root of 2491409688 is about 49914.0229594850. The cubic root of 2491409688 is about 1355.6525114423.

The spelling of 2491409688 in words is "two billion, four hundred ninety-one million, four hundred nine thousand, six hundred eighty-eight".