16164491 has 8 divisors (see below), whose sum is σ = 18505440. Its totient is φ = 13831488.

The previous prime is 16164481. The next prime is 16164503. The reversal of 16164491 is 19446161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16164491 - 2¹⁰ = 16163467 is a prime.

It is a super-2 number, since 2×16164491² = 522581538578162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16164461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (2313180).

Almost surely, 2^16164491 is an apocalyptic number.

16164491 is a deficient number, since it is larger than the sum of its proper divisors (2340949).

16164491 is an equidigital number, since it uses as much as digits as its factorization.

16164491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973.

The product of its digits is 5184, while the sum is 32.

The square root of 16164491 is about 4020.5087986473. The cubic root of 16164491 is about 252.8447911992.

The spelling of 16164491 in words is "sixteen million, one hundred sixty-four thousand, four hundred ninety-one".