2643443064 has 48 divisors (see below), whose sum is σ = 7210858200. Its totient is φ = 874805184.

The previous prime is 2643443063. The next prime is 2643443081. The reversal of 2643443064 is 4603443462.

2643443064 is a `hidden beast` number, since 2 + 6 + 4 + 344 + 306 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643443063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122059 + ... + 142074.

Almost surely, 2^2643443064 is an apocalyptic number.

2643443064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2643443064 is an abundant number, since it is smaller than the sum of its proper divisors (4567415136).

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

2643443064 is a wasteful number, since it uses less digits than its factorization.

2643443064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264284 (or 264277 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

The square root of 2643443064 is about 51414.4246685694. The cubic root of 2643443064 is about 1382.6852190675.

The spelling of 2643443064 in words is "two billion, six hundred forty-three million, four hundred forty-three thousand, sixty-four".