8161321768284 has 24 divisors (see below), whose sum is σ = 19043145510928. Its totient is φ = 2720431820160.

The previous prime is 8161321768283. The next prime is 8161321768321. The reversal of 8161321768284 is 4828671231618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161321768283) 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, 3579354 + ... + 5397630.

Almost surely, 2^{8161321768284} is an apocalyptic number.

It is an amenable number.

8161321768284 is an abundant number, since it is smaller than the sum of its proper divisors (10881823742644).

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

8161321768284 is a wasteful number, since it uses less digits than its factorization.

8161321768284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192325 (or 2192323 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The spelling of 8161321768284 in words is "eight trillion, one hundred sixty-one billion, three hundred twenty-one million, seven hundred sixty-eight thousand, two hundred eighty-four".