8091644290 has 16 divisors (see below), whose sum is σ = 14709169080. Its totient is φ = 3204611200.

The previous prime is 8091644279. The next prime is 8091644303. The reversal of 8091644290 is 924461908.

It can be written as a sum of positive squares in 4 ways, for example, as 7852972689 + 238671601 = 88617^2 + 15449^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4004755 + ... + 4006774.

Almost surely, 2^8091644290 is an apocalyptic number.

8091644290 is a deficient number, since it is larger than the sum of its proper divisors (6617524790).

8091644290 is a wasteful number, since it uses less digits than its factorization.

8091644290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8011637.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 8091644290 is about 89953.5674111928. The cubic root of 8091644290 is about 2007.6080462849.

The spelling of 8091644290 in words is "eight billion, ninety-one million, six hundred forty-four thousand, two hundred ninety".