168821393076 has 48 divisors (see below), whose sum is σ = 500211537280. Its totient is φ = 48234683520.

The previous prime is 168821393033. The next prime is 168821393089. The reversal of 168821393076 is 670393128861.

168821393076 is a `hidden beast` number, since 168 + 8 + 21 + 393 + 0 + 76 = 666.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 111653605 + ... + 111655116.

Almost surely, 2^168821393076 is an apocalyptic number.

It is an amenable number.

168821393076 is an abundant number, since it is smaller than the sum of its proper divisors (331390144204).

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

168821393076 is a wasteful number, since it uses less digits than its factorization.

168821393076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223308741 (or 223308733 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 168821393076 in words is "one hundred sixty-eight billion, eight hundred twenty-one million, three hundred ninety-three thousand, seventy-six".