6440171297 has 8 divisors (see below), whose sum is σ = 7372739136. Its totient is φ = 5510739312.

The previous prime is 6440171273. The next prime is 6440171333. The reversal of 6440171297 is 7921710446.

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 6440171297 - 2¹⁴ = 6440154913 is a prime.

It is a super-3 number, since 3×6440171297³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6440171207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779558 + ... + 787775.

It is an arithmetic number, because the mean of its divisors is an integer number (921592392).

Almost surely, 2^6440171297 is an apocalyptic number.

It is an amenable number.

6440171297 is a deficient number, since it is larger than the sum of its proper divisors (932567839).

6440171297 is a wasteful number, since it uses less digits than its factorization.

6440171297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567927.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 6440171297 is about 80250.6778600655. The cubic root of 6440171297 is about 1860.5119892631.

The spelling of 6440171297 in words is "six billion, four hundred forty million, one hundred seventy-one thousand, two hundred ninety-seven".