2643678306 has 12 divisors (see below), whose sum is σ = 5727969702. Its totient is φ = 881226096.

The previous prime is 2643678299. The next prime is 2643678311. The reversal of 2643678306 is 6038763462.

It can be written as a sum of positive squares in only one way, i.e., 2233980225 + 409698081 = 47265^2 + 20241^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73435491 + ... + 73435526.

Almost surely, 2^2643678306 is an apocalyptic number.

2643678306 is an abundant number, since it is smaller than the sum of its proper divisors (3084291396).

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

2643678306 is a wasteful number, since it uses less digits than its factorization.

2643678306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146871025 (or 146871022 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 2643678306 is about 51416.7123219678. The cubic root of 2643678306 is about 1382.7262332525.

The spelling of 2643678306 in words is "two billion, six hundred forty-three million, six hundred seventy-eight thousand, three hundred six".