164481645 has 16 divisors (see below), whose sum is σ = 263329920. Its totient is φ = 87670464.

The previous prime is 164481641. The next prime is 164481661. The reversal of 164481645 is 546184461.

It is not a de Polignac number, because 164481645 - 2² = 164481641 is a prime.

It is a super-3 number, since 3×164481645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164481641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44872 + ... + 48398.

It is an arithmetic number, because the mean of its divisors is an integer number (16458120).

Almost surely, 2^164481645 is an apocalyptic number.

164481645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164481645 is a deficient number, since it is larger than the sum of its proper divisors (98848275).

164481645 is a wasteful number, since it uses less digits than its factorization.

164481645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6644.

The product of its digits is 92160, while the sum is 39.

The square root of 164481645 is about 12825.0397660202. The cubic root of 164481645 is about 547.9056937633.

The spelling of 164481645 in words is "one hundred sixty-four million, four hundred eighty-one thousand, six hundred forty-five".