164555520 has 72 divisors (see below), whose sum is σ = 525561456. Its totient is φ = 43880448.

The previous prime is 164555473. The next prime is 164555527. The reversal of 164555520 is 25555461.

It is not an unprimeable number, because it can be changed into a prime (164555527) 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 7 ways as a sum of consecutive naturals, for example, 17587 + ... + 25266.

Almost surely, 2^164555520 is an apocalyptic number.

164555520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164555520 is an abundant number, since it is smaller than the sum of its proper divisors (361005936).

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

164555520 is an equidigital number, since it uses as much as digits as its factorization.

164555520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42877 (or 42863 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 164555520 is about 12827.9195507300. The cubic root of 164555520 is about 547.9877099558.

The spelling of 164555520 in words is "one hundred sixty-four million, five hundred fifty-five thousand, five hundred twenty".