167921966078780 has 12 divisors (see below), whose sum is σ = 352636128765480. Its totient is φ = 67168786431504.

The previous prime is 167921966078773. The next prime is 167921966078873. The reversal of 167921966078780 is 87870669129761.

It is a hoax number, since the sum of its digits (77) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4198049151950 + ... + 4198049151989.

It is an arithmetic number, because the mean of its divisors is an integer number (29386344063790).

Almost surely, 2^{167921966078780} is an apocalyptic number.

167921966078780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

167921966078780 is an abundant number, since it is smaller than the sum of its proper divisors (184714162686700).

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

167921966078780 is a wasteful number, since it uses less digits than its factorization.

167921966078780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8396098303948 (or 8396098303946 counting only the distinct ones).

The product of its (nonzero) digits is 768144384, while the sum is 77.

The spelling of 167921966078780 in words is "one hundred sixty-seven trillion, nine hundred twenty-one billion, nine hundred sixty-six million, seventy-eight thousand, seven hundred eighty".