1646646612 has 96 divisors (see below), whose sum is σ = 4270855680. Its totient is φ = 490613760.

The previous prime is 1646646611. The next prime is 1646646629. The reversal of 1646646612 is 2166466461.

It is a super-2 number, since 2×1646646612² = 5422890129622157088, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646646611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 651912 + ... + 654432.

It is an arithmetic number, because the mean of its divisors is an integer number (44488080).

Almost surely, 2^1646646612 is an apocalyptic number.

1646646612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1646646612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2135427840).

1646646612 is an abundant number, since it is smaller than the sum of its proper divisors (2624209068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1646646612 is a wasteful number, since it uses less digits than its factorization.

1646646612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673 (or 2671 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 1646646612 is about 40578.8936763929. The cubic root of 1646646612 is about 1180.8646855698.

The spelling of 1646646612 in words is "one billion, six hundred forty-six million, six hundred forty-six thousand, six hundred twelve".