6381320017 has 4 divisors (see below), whose sum is σ = 6386670180. Its totient is φ = 6375969856.

The previous prime is 6381319969. The next prime is 6381320021. The reversal of 6381320017 is 7100231836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1195015761 + 5186304256 = 34569^2 + 72016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6381320017 is a prime.

It is a super-3 number, since 3×6381320017³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6381320047) 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 3 ways as a sum of consecutive naturals, for example, 2673292 + ... + 2675677.

It is an arithmetic number, because the mean of its divisors is an integer number (1596667545).

Almost surely, 2^6381320017 is an apocalyptic number.

It is an amenable number.

6381320017 is a deficient number, since it is larger than the sum of its proper divisors (5350163).

6381320017 is a wasteful number, since it uses less digits than its factorization.

6381320017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350162.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 6381320017 is about 79883.1647908369. The cubic root of 6381320017 is about 1854.8274231529.

The spelling of 6381320017 in words is "six billion, three hundred eighty-one million, three hundred twenty thousand, seventeen".