646701645033 has 16 divisors (see below), whose sum is σ = 961137471040. Its totient is φ = 429756998112.

The previous prime is 646701645011. The next prime is 646701645061. The reversal of 646701645033 is 330546107646.

646701645033 is a `hidden beast` number, since 64 + 6 + 70 + 16 + 4 + 503 + 3 = 666.

It is not a de Polignac number, because 646701645033 - 2⁸ = 646701644777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646701645033.

It is not an unprimeable number, because it can be changed into a prime (646701640033) 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 15 ways as a sum of consecutive naturals, for example, 38253391 + ... + 38270292.

It is an arithmetic number, because the mean of its divisors is an integer number (60071091940).

Almost surely, 2^646701645033 is an apocalyptic number.

It is an amenable number.

646701645033 is a deficient number, since it is larger than the sum of its proper divisors (314435826007).

646701645033 is a wasteful number, since it uses less digits than its factorization.

646701645033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76524005 (or 76523999 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 646701645033 in words is "six hundred forty-six billion, seven hundred one million, six hundred forty-five thousand, thirty-three".