8005040642 has 4 divisors (see below), whose sum is σ = 12007560966. Its totient is φ = 4002520320.

The previous prime is 8005040639. The next prime is 8005040647. The reversal of 8005040642 is 2460405008.

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., 7960029961 + 45010681 = 89219^2 + 6709^2 .

It is not an unprimeable number, because it can be changed into a prime (8005040647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001260159 + ... + 2001260162.

Almost surely, 2^8005040642 is an apocalyptic number.

8005040642 is a deficient number, since it is larger than the sum of its proper divisors (4002520324).

8005040642 is a wasteful number, since it uses less digits than its factorization.

8005040642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002520323.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 8005040642 is about 89470.8927081875. The cubic root of 8005040642 is about 2000.4199653084.

The spelling of 8005040642 in words is "eight billion, five million, forty thousand, six hundred forty-two".