6420271277 has 16 divisors (see below), whose sum is σ = 7362230400. Its totient is φ = 5484544512.

The previous prime is 6420271261. The next prime is 6420271279. The reversal of 6420271277 is 7721720246.

It is a cyclic number.

It is not a de Polignac number, because 6420271277 - 2⁴ = 6420271261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6420271277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420271279) 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 15 ways as a sum of consecutive naturals, for example, 4133333 + ... + 4134885.

It is an arithmetic number, because the mean of its divisors is an integer number (460139400).

Almost surely, 2^6420271277 is an apocalyptic number.

It is an amenable number.

6420271277 is a deficient number, since it is larger than the sum of its proper divisors (941959123).

6420271277 is a wasteful number, since it uses less digits than its factorization.

6420271277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 6420271277 is about 80126.5953164116. The cubic root of 6420271277 is about 1858.5936952494.

The spelling of 6420271277 in words is "six billion, four hundred twenty million, two hundred seventy-one thousand, two hundred seventy-seven".