164156505 has 16 divisors (see below), whose sum is σ = 278100864. Its totient is φ = 82400000.

The previous prime is 164156483. The next prime is 164156513. The reversal of 164156505 is 505651461.

It is not a de Polignac number, because 164156505 - 2⁶ = 164156441 is a prime.

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, 321621 + ... + 322130.

It is an arithmetic number, because the mean of its divisors is an integer number (17381304).

Almost surely, 2^164156505 is an apocalyptic number.

164156505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164156505 is a deficient number, since it is larger than the sum of its proper divisors (113944359).

164156505 is a wasteful number, since it uses less digits than its factorization.

164156505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643776.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 164156505 is about 12812.3575114028. The cubic root of 164156505 is about 547.5444304136.

The spelling of 164156505 in words is "one hundred sixty-four million, one hundred fifty-six thousand, five hundred five".