6397091727975 has 108 divisors (see below), whose sum is σ = 12617371264680. Its totient is φ = 3095957779200.

The previous prime is 6397091727913. The next prime is 6397091727991. The reversal of 6397091727975 is 5797271907936.

It is not a de Polignac number, because 6397091727975 - 2⁶ = 6397091727911 is a prime.

It is a super-2 number, since 2×6397091727975² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 817765 + ... + 3669185.

It is an arithmetic number, because the mean of its divisors is an integer number (116827511710).

Almost surely, 2^{6397091727975} is an apocalyptic number.

6397091727975 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6397091727975 is a deficient number, since it is larger than the sum of its proper divisors (6220279536705).

6397091727975 is a wasteful number, since it uses less digits than its factorization.

6397091727975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851522 (or 2851501 counting only the distinct ones).

The product of its (nonzero) digits is 315059220, while the sum is 72.

The spelling of 6397091727975 in words is "six trillion, three hundred ninety-seven billion, ninety-one million, seven hundred twenty-seven thousand, nine hundred seventy-five".