6309172034991 has 144 divisors (see below), whose sum is σ = 11270734843680. Its totient is φ = 3477854983680.

The previous prime is 6309172034941. The next prime is 6309172034993. The reversal of 6309172034991 is 1994302719036.

It is a happy number.

6309172034991 is a `hidden beast` number, since 6 + 309 + 1 + 7 + 203 + 49 + 91 = 666.

It is not a de Polignac number, because 6309172034991 - 2¹⁸ = 6309171772847 is a prime.

It is a super-2 number, since 2×6309172034991² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6309172034993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1937109835 + ... + 1937113091.

It is an arithmetic number, because the mean of its divisors is an integer number (78268991970).

Almost surely, 2^{6309172034991} is an apocalyptic number.

6309172034991 is a deficient number, since it is larger than the sum of its proper divisors (4961562808689).

6309172034991 is a wasteful number, since it uses less digits than its factorization.

6309172034991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079 (or 5037 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 6309172034991 in words is "six trillion, three hundred nine billion, one hundred seventy-two million, thirty-four thousand, nine hundred ninety-one".