8640790079 has 4 divisors (see below), whose sum is σ = 8874324984. Its totient is φ = 8407255176.

The previous prime is 8640790021. The next prime is 8640790111. The reversal of 8640790079 is 9700970468.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8640790079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640790009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116767397 + ... + 116767470.

It is an arithmetic number, because the mean of its divisors is an integer number (2218581246).

Almost surely, 2^8640790079 is an apocalyptic number.

8640790079 is a deficient number, since it is larger than the sum of its proper divisors (233534905).

8640790079 is a wasteful number, since it uses less digits than its factorization.

8640790079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233534904.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 8640790079 is about 92955.8501601701. The cubic root of 8640790079 is about 2052.0336811466.

The spelling of 8640790079 in words is "eight billion, six hundred forty million, seven hundred ninety thousand, seventy-nine".