8187273816 has 32 divisors (see below), whose sum is σ = 20523978240. Its totient is φ = 2721652128.

The previous prime is 8187273811. The next prime is 8187273833. The reversal of 8187273816 is 6183727818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8187273811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455956 + ... + 473571.

It is an arithmetic number, because the mean of its divisors is an integer number (641374320).

Almost surely, 2^8187273816 is an apocalyptic number.

It is an amenable number.

8187273816 is an abundant number, since it is smaller than the sum of its proper divisors (12336704424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8187273816 is a wasteful number, since it uses less digits than its factorization.

8187273816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929903 (or 929899 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 8187273816 is about 90483.5555004333. Note that the first 4 decimals coincide. The cubic root of 8187273816 is about 2015.4859347666.

The spelling of 8187273816 in words is "eight billion, one hundred eighty-seven million, two hundred seventy-three thousand, eight hundred sixteen".