2643517868 has 12 divisors (see below), whose sum is σ = 4627419720. Its totient is φ = 1321397952.

The previous prime is 2643517859. The next prime is 2643517883. The reversal of 2643517868 is 8687153462.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73421 + ... + 103332.

It is an arithmetic number, because the mean of its divisors is an integer number (385618310).

Almost surely, 2^2643517868 is an apocalyptic number.

It is an amenable number.

2643517868 is a deficient number, since it is larger than the sum of its proper divisors (1983901852).

2643517868 is a wasteful number, since it uses less digits than its factorization.

2643517868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180496 (or 180494 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 2643517868 is about 51415.1521246412. The cubic root of 2643517868 is about 1382.6982613268.

The spelling of 2643517868 in words is "two billion, six hundred forty-three million, five hundred seventeen thousand, eight hundred sixty-eight".