164421560 has 32 divisors (see below), whose sum is σ = 371144160. Its totient is φ = 65556096.

The previous prime is 164421559. The next prime is 164421601. The reversal of 164421560 is 65124461.

It is a super-3 number, since 3×164421560³ (a number of 26 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 6197 + ... + 19163.

It is an arithmetic number, because the mean of its divisors is an integer number (11598255).

Almost surely, 2^164421560 is an apocalyptic number.

164421560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164421560 is an abundant number, since it is smaller than the sum of its proper divisors (206722600).

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

164421560 is a wasteful number, since it uses less digits than its factorization.

164421560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13295 (or 13291 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 164421560 is about 12822.6970641905. The cubic root of 164421560 is about 547.8389691487.

The spelling of 164421560 in words is "one hundred sixty-four million, four hundred twenty-one thousand, five hundred sixty".