8116847821 has 8 divisors (see below), whose sum is σ = 8473725504. Its totient is φ = 7760301120.

The previous prime is 8116847807. The next prime is 8116847833. The reversal of 8116847821 is 1287486118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8116847821 - 2²¹ = 8114750669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8116847891) 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, 31951 + ... + 131356.

It is an arithmetic number, because the mean of its divisors is an integer number (1059215688).

Almost surely, 2^8116847821 is an apocalyptic number.

It is an amenable number.

8116847821 is a deficient number, since it is larger than the sum of its proper divisors (356877683).

8116847821 is a wasteful number, since it uses less digits than its factorization.

8116847821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165491.

The product of its digits is 172032, while the sum is 46.

The square root of 8116847821 is about 90093.5503851413. The cubic root of 8116847821 is about 2009.6902917120.

The spelling of 8116847821 in words is "eight billion, one hundred sixteen million, eight hundred forty-seven thousand, eight hundred twenty-one".