491264011 has 16 divisors (see below), whose sum is σ = 595546560. Its totient is φ = 395596800.

The previous prime is 491263999. The next prime is 491264021. The reversal of 491264011 is 110462194.

It is not a de Polignac number, because 491264011 - 2⁵ = 491263979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491264021) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 68085 + ... + 74953.

It is an arithmetic number, because the mean of its divisors is an integer number (37221660).

Almost surely, 2^491264011 is an apocalyptic number.

491264011 is a deficient number, since it is larger than the sum of its proper divisors (104282549).

491264011 is a wasteful number, since it uses less digits than its factorization.

491264011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7494.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 491264011 is about 22164.4763303806. The cubic root of 491264011 is about 789.0508340995.

The spelling of 491264011 in words is "four hundred ninety-one million, two hundred sixty-four thousand, eleven".