646113612 has 24 divisors (see below), whose sum is σ = 1509659200. Its totient is φ = 215076816.

The previous prime is 646113607. The next prime is 646113613. The reversal of 646113612 is 216311646.

It is a super-2 number, since 2×646113612² = 834925599223373088, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 646113612.

It is not an unprimeable number, because it can be changed into a prime (646113613) 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 7 ways as a sum of consecutive naturals, for example, 27562 + ... + 45297.

Almost surely, 2^646113612 is an apocalyptic number.

It is an amenable number.

646113612 is an abundant number, since it is smaller than the sum of its proper divisors (863545588).

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

646113612 is a wasteful number, since it uses less digits than its factorization.

646113612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73605 (or 73603 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 646113612 is about 25418.7649581957. The cubic root of 646113612 is about 864.5092216368.

The spelling of 646113612 in words is "six hundred forty-six million, one hundred thirteen thousand, six hundred twelve".