83168391816 has 64 divisors (see below), whose sum is σ = 231057360000. Its totient is φ = 27718711488.

The previous prime is 83168391731. The next prime is 83168391833. The reversal of 83168391816 is 61819386138.

83168391816 is a `hidden beast` number, since 83 + 168 + 391 + 8 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677430 + ... + 1726298.

It is an arithmetic number, because the mean of its divisors is an integer number (3610271250).

Almost surely, 2^83168391816 is an apocalyptic number.

It is an amenable number.

83168391816 is an abundant number, since it is smaller than the sum of its proper divisors (147888968184).

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

83168391816 is a wasteful number, since it uses less digits than its factorization.

83168391816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56763 (or 56753 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The spelling of 83168391816 in words is "eighty-three billion, one hundred sixty-eight million, three hundred ninety-one thousand, eight hundred sixteen".