646646546 has 32 divisors (see below), whose sum is σ = 1232329728. Its totient is φ = 247561920.

The previous prime is 646646503. The next prime is 646646603. The reversal of 646646546 is 645646646.

It is a self number, because there is not a number n which added to its sum of digits gives 646646546.

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, 51665 + ... + 62948.

It is an arithmetic number, because the mean of its divisors is an integer number (38510304).

Almost surely, 2^646646546 is an apocalyptic number.

646646546 is a deficient number, since it is larger than the sum of its proper divisors (585683182).

646646546 is a wasteful number, since it uses less digits than its factorization.

646646546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114666.

The product of its digits is 2488320, while the sum is 47.

The square root of 646646546 is about 25429.2458794987. The cubic root of 646646546 is about 864.7468474111.

The spelling of 646646546 in words is "six hundred forty-six million, six hundred forty-six thousand, five hundred forty-six".