6420818671167 has 16 divisors (see below), whose sum is σ = 9065049729120. Its totient is φ = 4028586949632.

The previous prime is 6420818671159. The next prime is 6420818671193. The reversal of 6420818671167 is 7611768180246.

It is not a de Polignac number, because 6420818671167 - 2³ = 6420818671159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420818678167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1244638 + ... + 3793515.

It is an arithmetic number, because the mean of its divisors is an integer number (566565608070).

Almost surely, 2^{6420818671167} is an apocalyptic number.

6420818671167 is a deficient number, since it is larger than the sum of its proper divisors (2644231057953).

6420818671167 is a wasteful number, since it uses less digits than its factorization.

6420818671167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063162.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 6420818671167 in words is "six trillion, four hundred twenty billion, eight hundred eighteen million, six hundred seventy-one thousand, one hundred sixty-seven".