2643897036 has 24 divisors (see below), whose sum is σ = 6729920064. Its totient is φ = 801180880.

The previous prime is 2643897019. The next prime is 2643897041. The reversal of 2643897036 is 6307983462.

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 7 ways as a sum of consecutive naturals, for example, 10014630 + ... + 10014893.

It is an arithmetic number, because the mean of its divisors is an integer number (280413336).

Almost surely, 2^2643897036 is an apocalyptic number.

It is an amenable number.

2643897036 is an abundant number, since it is smaller than the sum of its proper divisors (4086023028).

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

2643897036 is a wasteful number, since it uses less digits than its factorization.

2643897036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20029541 (or 20029539 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 48.

The square root of 2643897036 is about 51418.8393101206. The cubic root of 2643897036 is about 1382.7643664055.

The spelling of 2643897036 in words is "two billion, six hundred forty-three million, eight hundred ninety-seven thousand, thirty-six".