8079721862 has 4 divisors (see below), whose sum is σ = 12119582796. Its totient is φ = 4039860930.

The previous prime is 8079721831. The next prime is 8079721873. The reversal of 8079721862 is 2681279708.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8079721862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2019930464 + ... + 2019930467.

It is an arithmetic number, because the mean of its divisors is an integer number (3029895699).

Almost surely, 2^8079721862 is an apocalyptic number.

8079721862 is a deficient number, since it is larger than the sum of its proper divisors (4039860934).

8079721862 is a wasteful number, since it uses less digits than its factorization.

8079721862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039860933.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 8079721862 is about 89887.2730813434. The cubic root of 8079721862 is about 2006.6215418981.

The spelling of 8079721862 in words is "eight billion, seventy-nine million, seven hundred twenty-one thousand, eight hundred sixty-two".