164446724421 has 64 divisors (see below), whose sum is σ = 293225932800. Its totient is φ = 88980208128.

The previous prime is 164446724413. The next prime is 164446724437. The reversal of 164446724421 is 124427644461.

164446724421 is a `hidden beast` number, since 164 + 4 + 4 + 67 + 2 + 4 + 421 = 666.

It is not a de Polignac number, because 164446724421 - 2³ = 164446724413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164446724021) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 8152270 + ... + 8172416.

It is an arithmetic number, because the mean of its divisors is an integer number (4581655200).

Almost surely, 2^164446724421 is an apocalyptic number.

It is an amenable number.

164446724421 is a deficient number, since it is larger than the sum of its proper divisors (128779208379).

164446724421 is a wasteful number, since it uses less digits than its factorization.

164446724421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22455 (or 22449 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 45.

The spelling of 164446724421 in words is "one hundred sixty-four billion, four hundred forty-six million, seven hundred twenty-four thousand, four hundred twenty-one".