646043430846 has 64 divisors (see below), whose sum is σ = 1492621240320. Its totient is φ = 184356372960.

The previous prime is 646043430797. The next prime is 646043430847. The reversal of 646043430846 is 648034340646.

It is a super-2 number, since 2×646043430846² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646043430795 and 646043430804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646043430847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1333056 + ... + 1751891.

It is an arithmetic number, because the mean of its divisors is an integer number (23322206880).

Almost surely, 2^646043430846 is an apocalyptic number.

646043430846 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

646043430846 is an abundant number, since it is smaller than the sum of its proper divisors (846577809474).

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

646043430846 is a wasteful number, since it uses less digits than its factorization.

646043430846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085149.

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 646043430846 in words is "six hundred forty-six billion, forty-three million, four hundred thirty thousand, eight hundred forty-six".