491469187368 has 32 divisors (see below), whose sum is σ = 1228835966400. Its totient is φ = 163801329408.

The previous prime is 491469187357. The next prime is 491469187373. The reversal of 491469187368 is 863781964194.

It is a junction number, because it is equal to n+sod(n) for n = 491469187299 and 491469187308.

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, 1173121 + ... + 1535952.

It is an arithmetic number, because the mean of its divisors is an integer number (38401123950).

Almost surely, 2^491469187368 is an apocalyptic number.

It is an amenable number.

491469187368 is an abundant number, since it is smaller than the sum of its proper divisors (737366779032).

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

491469187368 is a wasteful number, since it uses less digits than its factorization.

491469187368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716641 (or 2716637 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 66.

The spelling of 491469187368 in words is "four hundred ninety-one billion, four hundred sixty-nine million, one hundred eighty-seven thousand, three hundred sixty-eight".