491919414441 has 64 divisors (see below), whose sum is σ = 836052672000. Its totient is φ = 250237403136.

The previous prime is 491919414409. The next prime is 491919414451. The reversal of 491919414441 is 144414919194.

491919414441 is a nontrivial binomial coefficient, being equal to C(991887, 2).

It is not a de Polignac number, because 491919414441 - 2⁵ = 491919414409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491919414401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6907785 + ... + 6978633.

It is an arithmetic number, because the mean of its divisors is an integer number (13063323000).

Almost surely, 2^491919414441 is an apocalyptic number.

491919414441 is the 991886-th triangular number.

It is an amenable number.

491919414441 is a deficient number, since it is larger than the sum of its proper divisors (344133257559).

491919414441 is a wasteful number, since it uses less digits than its factorization.

491919414441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71778.

The product of its digits is 746496, while the sum is 51.

The spelling of 491919414441 in words is "four hundred ninety-one billion, nine hundred nineteen million, four hundred fourteen thousand, four hundred forty-one".