491159885584 has 45 divisors (see below), whose sum is σ = 956903536341. Its totient is φ = 244224541440.

The previous prime is 491159885561. The next prime is 491159885639. The reversal of 491159885584 is 485588951194.

The square root of 491159885584 is 700828.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 369386803984 + 121773081600 = 607772^2 + 348960^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 675597829 + ... + 675598555.

Almost surely, 2^491159885584 is an apocalyptic number.

491159885584 is the 700828-th square number.

It is an amenable number.

491159885584 is a deficient number, since it is larger than the sum of its proper divisors (465743650757).

491159885584 is an frugal number, since it uses more digits than its factorization.

491159885584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944 (or 970 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 67.

The spelling of 491159885584 in words is "four hundred ninety-one billion, one hundred fifty-nine million, eight hundred eighty-five thousand, five hundred eighty-four".