16491485 has 4 divisors (see below), whose sum is σ = 19789788. Its totient is φ = 13193184.

The previous prime is 16491467. The next prime is 16491493. The reversal of 16491485 is 58419461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13039321 + 3452164 = 3611^2 + 1858^2 .

It is a cyclic number.

It is not a de Polignac number, because 16491485 - 2²⁰ = 15442909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649144 + ... + 1649153.

It is an arithmetic number, because the mean of its divisors is an integer number (4947447).

Almost surely, 2^16491485 is an apocalyptic number.

It is an amenable number.

16491485 is a deficient number, since it is larger than the sum of its proper divisors (3298303).

16491485 is an equidigital number, since it uses as much as digits as its factorization.

16491485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298302.

The product of its digits is 34560, while the sum is 38.

The square root of 16491485 is about 4060.9709430135. The cubic root of 16491485 is about 254.5383676714.

The spelling of 16491485 in words is "sixteen million, four hundred ninety-one thousand, four hundred eighty-five".