491027912584 has 64 divisors (see below), whose sum is σ = 1019428934400. Its totient is φ = 219872577600.

The previous prime is 491027912581. The next prime is 491027912597. The reversal of 491027912584 is 485219720194.

It is a super-2 number, since 2×491027912584² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (491027912581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1539799 + ... + 1831129.

It is an arithmetic number, because the mean of its divisors is an integer number (15928577100).

Almost surely, 2^491027912584 is an apocalyptic number.

491027912584 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491027912584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509714467200).

491027912584 is an abundant number, since it is smaller than the sum of its proper divisors (528401021816).

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

491027912584 is a wasteful number, since it uses less digits than its factorization.

491027912584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291634 (or 291630 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 491027912584 in words is "four hundred ninety-one billion, twenty-seven million, nine hundred twelve thousand, five hundred eighty-four".