646033645 has 16 divisors (see below), whose sum is σ = 809256960. Its totient is φ = 494524800.

The previous prime is 646033627. The next prime is 646033669. The reversal of 646033645 is 546330646.

It is not a de Polignac number, because 646033645 - 2¹³ = 646025453 is a prime.

It is a super-3 number, since 3×646033645³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

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, 9621 + ... + 37210.

It is an arithmetic number, because the mean of its divisors is an integer number (50578560).

Almost surely, 2^646033645 is an apocalyptic number.

It is an amenable number.

646033645 is a deficient number, since it is larger than the sum of its proper divisors (163223315).

646033645 is a wasteful number, since it uses less digits than its factorization.

646033645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46956.

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 646033645 is about 25417.1919180699. The cubic root of 646033645 is about 864.4735545034.

The spelling of 646033645 in words is "six hundred forty-six million, thirty-three thousand, six hundred forty-five".