2643334394 has 4 divisors (see below), whose sum is σ = 3965001594. Its totient is φ = 1321667196.

The previous prime is 2643334333. The next prime is 2643334417. The reversal of 2643334394 is 4934333462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1917301369 + 726033025 = 43787^2 + 26945^2 .

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 as a sum of consecutive naturals, namely, 660833597 + ... + 660833600.

Almost surely, 2^2643334394 is an apocalyptic number.

2643334394 is a deficient number, since it is larger than the sum of its proper divisors (1321667200).

2643334394 is a wasteful number, since it uses less digits than its factorization.

2643334394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321667199.

The product of its digits is 559872, while the sum is 41.

The square root of 2643334394 is about 51413.3678531177. The cubic root of 2643334394 is about 1382.6662717504. Note that the first 3 decimals are identical.

The spelling of 2643334394 in words is "two billion, six hundred forty-three million, three hundred thirty-four thousand, three hundred ninety-four".