2643650443 has 16 divisors (see below), whose sum is σ = 3191614720. Its totient is φ = 2139107616.

The previous prime is 2643650431. The next prime is 2643650447. The reversal of 2643650443 is 3440563462.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2643650443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2643650447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2521 + ... + 72757.

It is an arithmetic number, because the mean of its divisors is an integer number (199475920).

Almost surely, 2^2643650443 is an apocalyptic number.

2643650443 is a deficient number, since it is larger than the sum of its proper divisors (547964277).

2643650443 is a wasteful number, since it uses less digits than its factorization.

2643650443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70546.

The product of its (nonzero) digits is 207360, while the sum is 37.

The square root of 2643650443 is about 51416.4413684961. The cubic root of 2643650443 is about 1382.7213754960.

The spelling of 2643650443 in words is "two billion, six hundred forty-three million, six hundred fifty thousand, four hundred forty-three".