164336491 has 16 divisors (see below), whose sum is σ = 189296640. Its totient is φ = 141095520.

The previous prime is 164336489. The next prime is 164336509. The reversal of 164336491 is 194633461.

It is not a de Polignac number, because 164336491 - 2¹ = 164336489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164336491.

It is not an unprimeable number, because it can be changed into a prime (164336441) 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, 79021 + ... + 81073.

It is an arithmetic number, because the mean of its divisors is an integer number (11831040).

Almost surely, 2^164336491 is an apocalyptic number.

164336491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164336491 is a deficient number, since it is larger than the sum of its proper divisors (24960149).

164336491 is a wasteful number, since it uses less digits than its factorization.

164336491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466.

The product of its digits is 46656, while the sum is 37.

The square root of 164336491 is about 12819.3795091650. The cubic root of 164336491 is about 547.7444719044.

The spelling of 164336491 in words is "one hundred sixty-four million, three hundred thirty-six thousand, four hundred ninety-one".