491265633 has 8 divisors (see below), whose sum is σ = 656367808. Its totient is φ = 326836944.

The previous prime is 491265617. The next prime is 491265659. The reversal of 491265633 is 336562194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491265633 - 2⁴ = 491265617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491265591 and 491265600.

It is not an unprimeable number, because it can be changed into a prime (491265233) 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 7 ways as a sum of consecutive naturals, for example, 166666 + ... + 169587.

It is an arithmetic number, because the mean of its divisors is an integer number (82045976).

Almost surely, 2^491265633 is an apocalyptic number.

It is an amenable number.

491265633 is a deficient number, since it is larger than the sum of its proper divisors (165102175).

491265633 is a wasteful number, since it uses less digits than its factorization.

491265633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336743.

The product of its digits is 116640, while the sum is 39.

The square root of 491265633 is about 22164.5129204321. The cubic root of 491265633 is about 789.0517024981.

The spelling of 491265633 in words is "four hundred ninety-one million, two hundred sixty-five thousand, six hundred thirty-three".