2768815640 has 16 divisors (see below), whose sum is σ = 6229835280. Its totient is φ = 1107526240.

The previous prime is 2768815597. The next prime is 2768815667. The reversal of 2768815640 is 465188672.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34610156 + ... + 34610235.

It is an arithmetic number, because the mean of its divisors is an integer number (389364705).

Almost surely, 2^2768815640 is an apocalyptic number.

2768815640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2768815640 is an abundant number, since it is smaller than the sum of its proper divisors (3461019640).

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

2768815640 is a wasteful number, since it uses less digits than its factorization.

2768815640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69220402 (or 69220398 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 2768815640 is about 52619.5366760294. The cubic root of 2768815640 is about 1404.2076880986.

The spelling of 2768815640 in words is "two billion, seven hundred sixty-eight million, eight hundred fifteen thousand, six hundred forty".