491913366 has 16 divisors (see below), whose sum is σ = 1124373504. Its totient is φ = 140546664.

The previous prime is 491913349. The next prime is 491913371. The reversal of 491913366 is 663319194.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 11712223 = 491913366 / (4 + 9 + 1 + 9 + 1 + 3 + 3 + 6 + 6).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5856070 + ... + 5856153.

It is an arithmetic number, because the mean of its divisors is an integer number (70273344).

Almost surely, 2^491913366 is an apocalyptic number.

491913366 is an abundant number, since it is smaller than the sum of its proper divisors (632460138).

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

491913366 is a wasteful number, since it uses less digits than its factorization.

491913366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712235.

The product of its digits is 104976, while the sum is 42.

The square root of 491913366 is about 22179.1200456646. The cubic root of 491913366 is about 789.3983380252.

The spelling of 491913366 in words is "four hundred ninety-one million, nine hundred thirteen thousand, three hundred sixty-six".