491794065 has 64 divisors (see below), whose sum is σ = 1013030400. Its totient is φ = 221709312.

The previous prime is 491794063. The next prime is 491794091. The reversal of 491794065 is 560497194.

It is not a de Polignac number, because 491794065 - 2¹ = 491794063 is a prime.

It is a super-2 number, since 2×491794065² = 483722804738448450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 491794065.

It is not an unprimeable number, because it can be changed into a prime (491794063) 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 63 ways as a sum of consecutive naturals, for example, 65421 + ... + 72549.

It is an arithmetic number, because the mean of its divisors is an integer number (15828600).

Almost surely, 2^491794065 is an apocalyptic number.

491794065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491794065 is an abundant number, since it is smaller than the sum of its proper divisors (521236335).

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

491794065 is a wasteful number, since it uses less digits than its factorization.

491794065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7223 (or 7217 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 491794065 is about 22176.4303935507. The cubic root of 491794065 is about 789.3345167429.

The spelling of 491794065 in words is "four hundred ninety-one million, seven hundred ninety-four thousand, sixty-five".