6391401443589 has 4 divisors (see below), whose sum is σ = 8521868591456. Its totient is φ = 4260934295724.

The previous prime is 6391401443561. The next prime is 6391401443591. The reversal of 6391401443589 is 9853441041936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6391401443589 - 2¹⁶ = 6391401378053 is a prime.

It is a super-2 number, since 2×6391401443589² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391401443389) 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, 1065233573929 + ... + 1065233573934.

It is an arithmetic number, because the mean of its divisors is an integer number (2130467147864).

Almost surely, 2^{6391401443589} is an apocalyptic number.

It is an amenable number.

6391401443589 is a deficient number, since it is larger than the sum of its proper divisors (2130467147867).

6391401443589 is a wasteful number, since it uses less digits than its factorization.

6391401443589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130467147866.

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 6391401443589 in words is "six trillion, three hundred ninety-one billion, four hundred one million, four hundred forty-three thousand, five hundred eighty-nine".