646323227620 has 48 divisors (see below), whose sum is σ = 1632816581760. Its totient is φ = 209933558784.

The previous prime is 646323227611. The next prime is 646323227657. The reversal of 646323227620 is 26722323646.

It is a super-2 number, since 2×646323227620² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121486669 + ... + 121491988.

It is an arithmetic number, because the mean of its divisors is an integer number (34017012120).

Almost surely, 2^646323227620 is an apocalyptic number.

It is an amenable number.

646323227620 is an abundant number, since it is smaller than the sum of its proper divisors (986493354140).

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

646323227620 is a wasteful number, since it uses less digits than its factorization.

646323227620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242978692 (or 242978690 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 43.

The spelling of 646323227620 in words is "six hundred forty-six billion, three hundred twenty-three million, two hundred twenty-seven thousand, six hundred twenty".