491763465 has 12 divisors (see below), whose sum is σ = 852390084. Its totient is φ = 262273824.

The previous prime is 491763443. The next prime is 491763479. The reversal of 491763465 is 564367194.

491763465 is a `hidden beast` number, since 4 + 9 + 1 + 7 + 634 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 50637456 + 441126009 = 7116^2 + 21003^2 .

It is not a de Polignac number, because 491763465 - 2¹⁰ = 491762441 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 10928077 = 491763465 / (4 + 9 + 1 + 7 + 6 + 3 + 4 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 491763465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5463994 + ... + 5464083.

It is an arithmetic number, because the mean of its divisors is an integer number (71032507).

Almost surely, 2^491763465 is an apocalyptic number.

491763465 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491763465 is a deficient number, since it is larger than the sum of its proper divisors (360626619).

491763465 is a wasteful number, since it uses less digits than its factorization.

491763465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10928088 (or 10928085 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 491763465 is about 22175.7404611436. The cubic root of 491763465 is about 789.3181452987.

The spelling of 491763465 in words is "four hundred ninety-one million, seven hundred sixty-three thousand, four hundred sixty-five".