164011605 has 16 divisors (see below), whose sum is σ = 264337344. Its totient is φ = 86833280.

The previous prime is 164011583. The next prime is 164011609. The reversal of 164011605 is 506110461.

It is not a de Polignac number, because 164011605 - 2¹⁷ = 163880533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164011609) 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, 37851 + ... + 41960.

It is an arithmetic number, because the mean of its divisors is an integer number (16521084).

Almost surely, 2^164011605 is an apocalyptic number.

164011605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164011605 is a deficient number, since it is larger than the sum of its proper divisors (100325739).

164011605 is a wasteful number, since it uses less digits than its factorization.

164011605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79956.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 164011605 is about 12806.7015659771. The cubic root of 164011605 is about 547.3832782182.

The spelling of 164011605 in words is "one hundred sixty-four million, eleven thousand, six hundred five".