6440107271671 has 4 divisors (see below), whose sum is σ = 6440114672712. Its totient is φ = 6440099870632.

The previous prime is 6440107271627. The next prime is 6440107271677. The reversal of 6440107271671 is 1761727010446.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6440107271671 - 2¹⁹ = 6440106747383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440107271677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2189656 + ... + 4204141.

It is an arithmetic number, because the mean of its divisors is an integer number (1610028668178).

Almost surely, 2^{6440107271671} is an apocalyptic number.

6440107271671 is a deficient number, since it is larger than the sum of its proper divisors (7401041).

6440107271671 is a wasteful number, since it uses less digits than its factorization.

6440107271671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7401040.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 6440107271671 in words is "six trillion, four hundred forty billion, one hundred seven million, two hundred seventy-one thousand, six hundred seventy-one".