8072181863 has 4 divisors (see below), whose sum is σ = 8497033560. Its totient is φ = 7647330168.

The previous prime is 8072181841. The next prime is 8072181877. The reversal of 8072181863 is 3681812708.

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-8072181863 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 (8072181823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212425820 + ... + 212425857.

It is an arithmetic number, because the mean of its divisors is an integer number (2124258390).

Almost surely, 2^8072181863 is an apocalyptic number.

8072181863 is a deficient number, since it is larger than the sum of its proper divisors (424851697).

8072181863 is a wasteful number, since it uses less digits than its factorization.

8072181863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424851696.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 8072181863 is about 89845.3218759886. The cubic root of 8072181863 is about 2005.9971543455.

The spelling of 8072181863 in words is "eight billion, seventy-two million, one hundred eighty-one thousand, eight hundred sixty-three".