491961169194 has 16 divisors (see below), whose sum is σ = 1073369823840. Its totient is φ = 149079142160.

The previous prime is 491961169177. The next prime is 491961169199.

491961169194 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (491961169199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3726978489 + ... + 3726978620.

It is an arithmetic number, because the mean of its divisors is an integer number (67085613990).

Almost surely, 2^491961169194 is an apocalyptic number.

491961169194 is an abundant number, since it is smaller than the sum of its proper divisors (581408654646).

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

491961169194 is a wasteful number, since it uses less digits than its factorization.

491961169194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7453957125.

The product of its digits is 3779136, while the sum is 60.

The spelling of 491961169194 in words is "four hundred ninety-one billion, nine hundred sixty-one million, one hundred sixty-nine thousand, one hundred ninety-four".