646243330011016 has 16 divisors (see below), whose sum is σ = 1211726809584540. Its totient is φ = 323116180788480.

The previous prime is 646243330011007. The next prime is 646243330011023. The reversal of 646243330011016 is 610110033342646.

It can be written as a sum of positive squares in 2 ways, for example, as 606575326562500 + 39668003448516 = 24628750^2 + 6298254^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 646243330011016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685026301 + ... + 685969036.

Almost surely, 2^{646243330011016} is an apocalyptic number.

It is an amenable number.

646243330011016 is a deficient number, since it is larger than the sum of its proper divisors (565483479573524).

646243330011016 is a wasteful number, since it uses less digits than its factorization.

646243330011016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371054264 (or 1371054260 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 646243330011016 in words is "six hundred forty-six trillion, two hundred forty-three billion, three hundred thirty million, eleven thousand, sixteen".