643419312 has 20 divisors (see below), whose sum is σ = 1662166680. Its totient is φ = 214473088.

The previous prime is 643419269. The next prime is 643419313. The reversal of 643419312 is 213914346.

It is a super-2 number, since 2×643419312² = 827976822109106688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643419313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6702237 + ... + 6702332.

It is an arithmetic number, because the mean of its divisors is an integer number (83108334).

Almost surely, 2^643419312 is an apocalyptic number.

It is an amenable number.

643419312 is an abundant number, since it is smaller than the sum of its proper divisors (1018747368).

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

643419312 is a wasteful number, since it uses less digits than its factorization.

643419312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13404580 (or 13404574 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 643419312 is about 25365.7113442537. The cubic root of 643419312 is about 863.3058768302.

The spelling of 643419312 in words is "six hundred forty-three million, four hundred nineteen thousand, three hundred twelve".