491163265 has 16 divisors (see below), whose sum is σ = 603725760. Its totient is φ = 383486400.

The previous prime is 491163241. The next prime is 491163289. The reversal of 491163265 is 562361194.

It is an interprime number because it is at equal distance from previous prime (491163241) and next prime (491163289).

It is not a de Polignac number, because 491163265 - 2²¹ = 489066113 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29790 + ... + 43240.

It is an arithmetic number, because the mean of its divisors is an integer number (37732860).

Almost surely, 2^491163265 is an apocalyptic number.

It is an amenable number.

491163265 is a deficient number, since it is larger than the sum of its proper divisors (112562495).

491163265 is a wasteful number, since it uses less digits than its factorization.

491163265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13632.

The product of its digits is 38880, while the sum is 37.

The square root of 491163265 is about 22162.2035231157. The cubic root of 491163265 is about 788.9968921943.

The spelling of 491163265 in words is "four hundred ninety-one million, one hundred sixty-three thousand, two hundred sixty-five".