6420640113 has 48 divisors (see below), whose sum is σ = 10095820800. Its totient is φ = 3917121120.

The previous prime is 6420640103. The next prime is 6420640169. The reversal of 6420640113 is 3110460246.

6420640113 is a `hidden beast` number, since 6 + 4 + 2 + 0 + 640 + 1 + 13 = 666.

6420640113 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6420640113 - 2⁴ = 6420640097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6420640103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5019408 + ... + 5020686.

It is an arithmetic number, because the mean of its divisors is an integer number (210329600).

Almost surely, 2^6420640113 is an apocalyptic number.

It is an amenable number.

6420640113 is a deficient number, since it is larger than the sum of its proper divisors (3675180687).

6420640113 is a wasteful number, since it uses less digits than its factorization.

6420640113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6420640113 is about 80128.8968662367. The cubic root of 6420640113 is about 1858.6292858087.

The spelling of 6420640113 in words is "six billion, four hundred twenty million, six hundred forty thousand, one hundred thirteen".