491375666573194 has 64 divisors (see below), whose sum is σ = 820425510051840. Its totient is φ = 219189216980160.

The previous prime is 491375666573179. The next prime is 491375666573227.

491375666573194 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 491375666573194.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10733624997 + ... + 10733670775.

It is an arithmetic number, because the mean of its divisors is an integer number (12819148594560).

Almost surely, 2^{491375666573194} is an apocalyptic number.

491375666573194 is a deficient number, since it is larger than the sum of its proper divisors (329049843478646).

491375666573194 is a wasteful number, since it uses less digits than its factorization.

491375666573194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62755.

The product of its digits is 3086294400, while the sum is 76.

The spelling of 491375666573194 in words is "four hundred ninety-one trillion, three hundred seventy-five billion, six hundred sixty-six million, five hundred seventy-three thousand, one hundred ninety-four".