164320780 has 48 divisors (see below), whose sum is σ = 372585024. Its totient is φ = 60514560.

The previous prime is 164320777. The next prime is 164320799. The reversal of 164320780 is 87023461.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 158865 + ... + 159895.

It is an arithmetic number, because the mean of its divisors is an integer number (7762188).

Almost surely, 2^164320780 is an apocalyptic number.

164320780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164320780 is an abundant number, since it is smaller than the sum of its proper divisors (208264244).

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

164320780 is a wasteful number, since it uses less digits than its factorization.

164320780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 164320780 is about 12818.7667113494. The cubic root of 164320780 is about 547.7270160783.

The spelling of 164320780 in words is "one hundred sixty-four million, three hundred twenty thousand, seven hundred eighty".