491668776 has 48 divisors (see below), whose sum is σ = 1401691200. Its totient is φ = 155263392.

The previous prime is 491668759. The next prime is 491668777. The reversal of 491668776 is 677866194.

It is a happy number.

491668776 is a `hidden beast` number, since 491 + 6 + 6 + 87 + 76 = 666.

It is not an unprimeable number, because it can be changed into a prime (491668777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178336 + ... + 181071.

It is an arithmetic number, because the mean of its divisors is an integer number (29201900).

Almost surely, 2^491668776 is an apocalyptic number.

It is an amenable number.

491668776 is an abundant number, since it is smaller than the sum of its proper divisors (910022424).

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

491668776 is a wasteful number, since it uses less digits than its factorization.

491668776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359438 (or 359431 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 491668776 is about 22173.6053901931. The cubic root of 491668776 is about 789.2674810067.

The spelling of 491668776 in words is "four hundred ninety-one million, six hundred sixty-eight thousand, seven hundred seventy-six".