6420555211 has 24 divisors (see below), whose sum is σ = 7525140000. Its totient is φ = 5461997184.

The previous prime is 6420555181. The next prime is 6420555233. The reversal of 6420555211 is 1125550246.

It is not a de Polignac number, because 6420555211 - 2⁷ = 6420555083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6420555611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4588690 + ... + 4590088.

It is an arithmetic number, because the mean of its divisors is an integer number (313547500).

Almost surely, 2^6420555211 is an apocalyptic number.

6420555211 is a deficient number, since it is larger than the sum of its proper divisors (1104584789).

6420555211 is a wasteful number, since it uses less digits than its factorization.

6420555211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 6420555211 is about 80128.3670805789. The cubic root of 6420555211 is about 1858.6210933732.

The spelling of 6420555211 in words is "six billion, four hundred twenty million, five hundred fifty-five thousand, two hundred eleven".