6340020645 has 32 divisors (see below), whose sum is σ = 11967160320. Its totient is φ = 2804800320.

The previous prime is 6340020619. The next prime is 6340020649. The reversal of 6340020645 is 5460200436.

It is not a de Polignac number, because 6340020645 - 2⁷ = 6340020517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6340020649) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 970635 + ... + 977144.

It is an arithmetic number, because the mean of its divisors is an integer number (373973760).

Almost surely, 2^6340020645 is an apocalyptic number.

It is an amenable number.

6340020645 is a deficient number, since it is larger than the sum of its proper divisors (5627139675).

6340020645 is a wasteful number, since it uses less digits than its factorization.

6340020645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947825.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 6340020645 is about 79624.2465898422. The cubic root of 6340020645 is about 1850.8173301092.

The spelling of 6340020645 in words is "six billion, three hundred forty million, twenty thousand, six hundred forty-five".