16646145 has 32 divisors (see below), whose sum is σ = 29185920. Its totient is φ = 8064000.

The previous prime is 16646099. The next prime is 16646167. The reversal of 16646145 is 54164661.

It is a happy number.

It is not a de Polignac number, because 16646145 - 2¹¹ = 16644097 is a prime.

It is a super-2 number, since 2×16646145² = 554188286722050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6270 + ... + 8520.

It is an arithmetic number, because the mean of its divisors is an integer number (912060).

It is a Proth number, since it is equal to 127 ⋅ 2¹⁷ + 1 and 127 < 2¹⁷.

Almost surely, 2^16646145 is an apocalyptic number.

16646145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16646145 is a deficient number, since it is larger than the sum of its proper divisors (12539775).

16646145 is a wasteful number, since it uses less digits than its factorization.

16646145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305.

The product of its digits is 17280, while the sum is 33.

The square root of 16646145 is about 4079.9687498803. The cubic root of 16646145 is about 255.3315947605.

The spelling of 16646145 in words is "sixteen million, six hundred forty-six thousand, one hundred forty-five".