6377718321 has 12 divisors (see below), whose sum is σ = 9920895348. Its totient is φ = 3924749664.

The previous prime is 6377718311. The next prime is 6377718383. The reversal of 6377718321 is 1238177736.

6377718321 is a `hidden beast` number, since 637 + 7 + 7 + 1 + 8 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1126542096 + 5251176225 = 33564^2 + 72465^2 .

It is not a de Polignac number, because 6377718321 - 2²³ = 6369329713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6377718301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27255090 + ... + 27255323.

It is an arithmetic number, because the mean of its divisors is an integer number (826741279).

Almost surely, 2^6377718321 is an apocalyptic number.

It is an amenable number.

6377718321 is a deficient number, since it is larger than the sum of its proper divisors (3543177027).

6377718321 is a wasteful number, since it uses less digits than its factorization.

6377718321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54510432 (or 54510429 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 6377718321 is about 79860.6180855120. The cubic root of 6377718321 is about 1854.4783949610.

The spelling of 6377718321 in words is "six billion, three hundred seventy-seven million, seven hundred eighteen thousand, three hundred twenty-one".