2768578644 has 24 divisors (see below), whose sum is σ = 6956941600. Its totient is φ = 851870304.

The previous prime is 2768578601. The next prime is 2768578661. The reversal of 2768578644 is 4468758672.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 8873494 + ... + 8873805.

Almost surely, 2^2768578644 is an apocalyptic number.

It is an amenable number.

2768578644 is an abundant number, since it is smaller than the sum of its proper divisors (4188362956).

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

2768578644 is a wasteful number, since it uses less digits than its factorization.

2768578644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17747319 (or 17747317 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 57.

The square root of 2768578644 is about 52617.2846505785. The cubic root of 2768578644 is about 1404.1676227008.

The spelling of 2768578644 in words is "two billion, seven hundred sixty-eight million, five hundred seventy-eight thousand, six hundred forty-four".