491606121606194 has 64 divisors (see below), whose sum is σ = 887880471797760. Its totient is φ = 199425907414080.

The previous prime is 491606121606181. The next prime is 491606121606323.

491606121606194 is nontrivially palindromic in base 10.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1884190412 + ... + 1884451304.

It is an arithmetic number, because the mean of its divisors is an integer number (13873132371840).

Almost surely, 2^{491606121606194} is an apocalyptic number.

491606121606194 is a deficient number, since it is larger than the sum of its proper divisors (396274350191566).

491606121606194 is a wasteful number, since it uses less digits than its factorization.

491606121606194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267055.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 491606121606194 in words is "four hundred ninety-one trillion, six hundred six billion, one hundred twenty-one million, six hundred six thousand, one hundred ninety-four".