1646494067 has 4 divisors (see below), whose sum is σ = 1659062856. Its totient is φ = 1633925280.

The previous prime is 1646494027. The next prime is 1646494097. The reversal of 1646494067 is 7604946461.

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

It is a cyclic number.

It is not a de Polignac number, because 1646494067 - 2²⁸ = 1378058611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1646494027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6284198 + ... + 6284459.

It is an arithmetic number, because the mean of its divisors is an integer number (414765714).

Almost surely, 2^1646494067 is an apocalyptic number.

1646494067 is a deficient number, since it is larger than the sum of its proper divisors (12568789).

1646494067 is a wasteful number, since it uses less digits than its factorization.

1646494067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12568788.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 1646494067 is about 40577.0140227198. The cubic root of 1646494067 is about 1180.8282194240.

The spelling of 1646494067 in words is "one billion, six hundred forty-six million, four hundred ninety-four thousand, sixty-seven".