1646612042 has 8 divisors (see below), whose sum is σ = 2487947076. Its totient is φ = 817296352.

The previous prime is 1646612041. The next prime is 1646612047. The reversal of 1646612042 is 2402166461.

It can be written as a sum of positive squares in 2 ways, for example, as 1641141121 + 5470921 = 40511^2 + 2339^2 .

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

It is a super-2 number, since 2×1646612042² = 5422662433718819528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1646612041) 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, 3004493 + ... + 3005040.

Almost surely, 2^1646612042 is an apocalyptic number.

1646612042 is a deficient number, since it is larger than the sum of its proper divisors (841335034).

1646612042 is a wasteful number, since it uses less digits than its factorization.

1646612042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6009672.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1646612042 is about 40578.4677138011. The cubic root of 1646612042 is about 1180.8564217490.

The spelling of 1646612042 in words is "one billion, six hundred forty-six million, six hundred twelve thousand, forty-two".