491995627776 has 135 divisors (see below), whose sum is σ = 1467343180303. Its totient is φ = 163964874240.

The previous prime is 491995627757. The next prime is 491995627789. The reversal of 491995627776 is 677726599194.

The square root of 491995627776 is 701424.

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

491995627776 is a `hidden beast` number, since 49 + 19 + 9 + 562 + 7 + 7 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 101002621 + ... + 101007491.

Almost surely, 2^491995627776 is an apocalyptic number.

491995627776 is the 701424-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491995627776

491995627776 is an abundant number, since it is smaller than the sum of its proper divisors (975347552527).

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

491995627776 is an frugal number, since it uses more digits than its factorization.

491995627776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9770 (or 4876 counting only the distinct ones).

The product of its digits is 360067680, while the sum is 72.

The spelling of 491995627776 in words is "four hundred ninety-one billion, nine hundred ninety-five million, six hundred twenty-seven thousand, seven hundred seventy-six".