491451872916 has 24 divisors (see below), whose sum is σ = 1171119358080. Its totient is φ = 160331816512.

The previous prime is 491451872881. The next prime is 491451872971. The reversal of 491451872916 is 619278154194.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 435683721 + ... + 435684848.

It is an arithmetic number, because the mean of its divisors is an integer number (48796639920).

Almost surely, 2^491451872916 is an apocalyptic number.

It is an amenable number.

491451872916 is an abundant number, since it is smaller than the sum of its proper divisors (679667485164).

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

491451872916 is a wasteful number, since it uses less digits than its factorization.

491451872916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871368623 (or 871368621 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 57.

The spelling of 491451872916 in words is "four hundred ninety-one billion, four hundred fifty-one million, eight hundred seventy-two thousand, nine hundred sixteen".