6420640118 has 24 divisors (see below), whose sum is σ = 10328753232. Its totient is φ = 2987718624.

The previous prime is 6420640103. The next prime is 6420640169. The reversal of 6420640118 is 8110460246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11996 + ... + 113952.

It is an arithmetic number, because the mean of its divisors is an integer number (430364718).

Almost surely, 2^6420640118 is an apocalyptic number.

6420640118 is a deficient number, since it is larger than the sum of its proper divisors (3908113114).

6420640118 is a wasteful number, since it uses less digits than its factorization.

6420640118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102056 (or 102019 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 6420640118 is about 80128.8968974364. The cubic root of 6420640118 is about 1858.6292862911.

The spelling of 6420640118 in words is "six billion, four hundred twenty million, six hundred forty thousand, one hundred eighteen".