164856945 has 16 divisors (see below), whose sum is σ = 287750592. Its totient is φ = 79930560.

The previous prime is 164856931. The next prime is 164856997. The reversal of 164856945 is 549658461.

It is not a de Polignac number, because 164856945 - 2⁴ = 164856929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164856894 and 164856903.

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, 499402 + ... + 499731.

It is an arithmetic number, because the mean of its divisors is an integer number (17984412).

Almost surely, 2^164856945 is an apocalyptic number.

164856945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164856945 is a deficient number, since it is larger than the sum of its proper divisors (122893647).

164856945 is a wasteful number, since it uses less digits than its factorization.

164856945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999152.

The product of its digits is 1036800, while the sum is 48.

The square root of 164856945 is about 12839.6629628663. The cubic root of 164856945 is about 548.3220985022.

The spelling of 164856945 in words is "one hundred sixty-four million, eight hundred fifty-six thousand, nine hundred forty-five".