6172931638986 has 96 divisors (see below), whose sum is σ = 15159264966720. Its totient is φ = 1670868168480.

The previous prime is 6172931638943. The next prime is 6172931638987. The reversal of 6172931638986 is 6898361392716.

It is a self number, because there is not a number n which added to its sum of digits gives 6172931638986.

It is not an unprimeable number, because it can be changed into a prime (6172931638987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 485976 + ... + 3547116.

It is an arithmetic number, because the mean of its divisors is an integer number (157909010070).

Almost surely, 2^{6172931638986} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6172931638986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7579632483360).

6172931638986 is an abundant number, since it is smaller than the sum of its proper divisors (8986333327734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6172931638986 is a wasteful number, since it uses less digits than its factorization.

6172931638986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061217 (or 3061172 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 69.

The spelling of 6172931638986 in words is "six trillion, one hundred seventy-two billion, nine hundred thirty-one million, six hundred thirty-eight thousand, nine hundred eighty-six".