8721265822 has 4 divisors (see below), whose sum is σ = 13081898736. Its totient is φ = 4360632910.

The previous prime is 8721265811. The next prime is 8721265837. The reversal of 8721265822 is 2285621278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2285621278 = 2 ⋅1142810639.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2180316454 + ... + 2180316457.

It is an arithmetic number, because the mean of its divisors is an integer number (3270474684).

Almost surely, 2^8721265822 is an apocalyptic number.

8721265822 is a deficient number, since it is larger than the sum of its proper divisors (4360632914).

8721265822 is a wasteful number, since it uses less digits than its factorization.

8721265822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360632913.

The product of its digits is 215040, while the sum is 43.

The square root of 8721265822 is about 93387.7177256196. The cubic root of 8721265822 is about 2058.3845239798.

The spelling of 8721265822 in words is "eight billion, seven hundred twenty-one million, two hundred sixty-five thousand, eight hundred twenty-two".