163121564 has 12 divisors (see below), whose sum is σ = 290142888. Its totient is φ = 80223600.

The previous prime is 163121561. The next prime is 163121599. The reversal of 163121564 is 465121361.

It is a happy number.

163121564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163121561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334022 + ... + 334509.

It is an arithmetic number, because the mean of its divisors is an integer number (24178574).

Almost surely, 2^163121564 is an apocalyptic number.

It is an amenable number.

163121564 is a deficient number, since it is larger than the sum of its proper divisors (127021324).

163121564 is a wasteful number, since it uses less digits than its factorization.

163121564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668596 (or 668594 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 163121564 is about 12771.9052611582. The cubic root of 163121564 is about 546.3913209508.

The spelling of 163121564 in words is "one hundred sixty-three million, one hundred twenty-one thousand, five hundred sixty-four".