491273736912 has 60 divisors (see below), whose sum is σ = 1571296161760. Its totient is φ = 140363924544.

The previous prime is 491273736883. The next prime is 491273736953. The reversal of 491273736912 is 219637372194.

491273736912 is a `hidden beast` number, since 4 + 9 + 1 + 273 + 7 + 369 + 1 + 2 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243686362 + ... + 243688377.

Almost surely, 2^491273736912 is an apocalyptic number.

491273736912 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

491273736912 is an abundant number, since it is smaller than the sum of its proper divisors (1080022424848).

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

491273736912 is a wasteful number, since it uses less digits than its factorization.

491273736912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487374760 (or 487374751 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The spelling of 491273736912 in words is "four hundred ninety-one billion, two hundred seventy-three million, seven hundred thirty-six thousand, nine hundred twelve".