6420275255 has 8 divisors (see below), whose sum is σ = 7731555792. Its totient is φ = 5118069888.

The previous prime is 6420275249. The next prime is 6420275293. The reversal of 6420275255 is 5525720246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6420275255 - 2¹⁸ = 6420013111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2267234 + ... + 2270063.

It is an arithmetic number, because the mean of its divisors is an integer number (966444474).

Almost surely, 2^6420275255 is an apocalyptic number.

6420275255 is a deficient number, since it is larger than the sum of its proper divisors (1311280537).

6420275255 is a wasteful number, since it uses less digits than its factorization.

6420275255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4537585.

The product of its (nonzero) digits is 168000, while the sum is 38.

The square root of 6420275255 is about 80126.6201396265. The cubic root of 6420275255 is about 1858.5940791108.

The spelling of 6420275255 in words is "six billion, four hundred twenty million, two hundred seventy-five thousand, two hundred fifty-five".