646642350306 has 32 divisors (see below), whose sum is σ = 1437100254720. Its totient is φ = 215529862032.

The previous prime is 646642350301. The next prime is 646642350359. The reversal of 646642350306 is 603053246646.

646642350306 is a `hidden beast` number, since 64 + 6 + 64 + 23 + 503 + 0 + 6 = 666.

646642350306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (646642350301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187951 + ... + 1152653.

It is an arithmetic number, because the mean of its divisors is an integer number (44909382960).

Almost surely, 2^646642350306 is an apocalyptic number.

646642350306 is an abundant number, since it is smaller than the sum of its proper divisors (790457904414).

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

646642350306 is a wasteful number, since it uses less digits than its factorization.

646642350306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977127 (or 977121 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 45.

The spelling of 646642350306 in words is "six hundred forty-six billion, six hundred forty-two million, three hundred fifty thousand, three hundred six".