491316077720 has 32 divisors (see below), whose sum is σ = 1190496651120. Its totient is φ = 181409013120.

The previous prime is 491316077719. The next prime is 491316077737. The reversal of 491316077720 is 27770613194.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472418786 + ... + 472419825.

Almost surely, 2^491316077720 is an apocalyptic number.

491316077720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491316077720 is an abundant number, since it is smaller than the sum of its proper divisors (699180573400).

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

491316077720 is a wasteful number, since it uses less digits than its factorization.

491316077720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944838635 (or 944838631 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 47.

The spelling of 491316077720 in words is "four hundred ninety-one billion, three hundred sixteen million, seventy-seven thousand, seven hundred twenty".