164162505 has 16 divisors (see below), whose sum is σ = 282864960. Its totient is φ = 80818368.

The previous prime is 164162501. The next prime is 164162507. The reversal of 164162505 is 505261461.

It is not a de Polignac number, because 164162505 - 2² = 164162501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164162501) 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, 420735 + ... + 421124.

It is an arithmetic number, because the mean of its divisors is an integer number (17679060).

Almost surely, 2^164162505 is an apocalyptic number.

164162505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164162505 is a deficient number, since it is larger than the sum of its proper divisors (118702455).

164162505 is a wasteful number, since it uses less digits than its factorization.

164162505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841880.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 164162505 is about 12812.5916582087. The cubic root of 164162505 is about 547.5511013373.

It can be divided in two parts, 1641 and 62505, that added together give a palindrome (64146).

The spelling of 164162505 in words is "one hundred sixty-four million, one hundred sixty-two thousand, five hundred five".