164187994122 has 48 divisors (see below), whose sum is σ = 361841220000. Its totient is φ = 53791147872.

The previous prime is 164187994073. The next prime is 164187994123. The reversal of 164187994122 is 221499781461.

164187994122 is a `hidden beast` number, since 1 + 64 + 1 + 87 + 99 + 412 + 2 = 666.

164187994122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (164187994123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6858129 + ... + 6882027.

It is an arithmetic number, because the mean of its divisors is an integer number (7538358750).

Almost surely, 2^164187994122 is an apocalyptic number.

164187994122 is an abundant number, since it is smaller than the sum of its proper divisors (197653225878).

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

164187994122 is a wasteful number, since it uses less digits than its factorization.

164187994122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30435 (or 30432 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 164187994122 in words is "one hundred sixty-four billion, one hundred eighty-seven million, nine hundred ninety-four thousand, one hundred twenty-two".