6733621645 has 16 divisors (see below), whose sum is σ = 8239656960. Its totient is φ = 5280859584.

The previous prime is 6733621633. The next prime is 6733621663. The reversal of 6733621645 is 5461263376.

It is a cyclic number.

It is not a de Polignac number, because 6733621645 - 2¹⁵ = 6733588877 is a prime.

It is a super-3 number, since 3×6733621645³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329002 + ... + 348868.

It is an arithmetic number, because the mean of its divisors is an integer number (514978560).

Almost surely, 2^6733621645 is an apocalyptic number.

It is an amenable number.

6733621645 is a deficient number, since it is larger than the sum of its proper divisors (1506035315).

6733621645 is a wasteful number, since it uses less digits than its factorization.

6733621645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21204.

The product of its digits is 544320, while the sum is 43.

The square root of 6733621645 is about 82058.6475942664. The cubic root of 6733621645 is about 1888.3517861861.

The spelling of 6733621645 in words is "six billion, seven hundred thirty-three million, six hundred twenty-one thousand, six hundred forty-five".