646012443 has 8 divisors (see below), whose sum is σ = 862866000. Its totient is φ = 429916928.

The previous prime is 646012399. The next prime is 646012511. The reversal of 646012443 is 344210646.

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

It is a cyclic number.

It is not a de Polignac number, because 646012443 - 2⁸ = 646012187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646012443.

It is not an unprimeable number, because it can be changed into a prime (646012643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187518 + ... + 190931.

It is an arithmetic number, because the mean of its divisors is an integer number (107858250).

Almost surely, 2^646012443 is an apocalyptic number.

646012443 is a deficient number, since it is larger than the sum of its proper divisors (216853557).

646012443 is a wasteful number, since it uses less digits than its factorization.

646012443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379021.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 646012443 is about 25416.7748347425. The cubic root of 646012443 is about 864.4640974269.

The spelling of 646012443 in words is "six hundred forty-six million, twelve thousand, four hundred forty-three".