491458734569 has 16 divisors (see below), whose sum is σ = 536617267200. Its totient is φ = 446380506000.

The previous prime is 491458734563. The next prime is 491458734607. The reversal of 491458734569 is 965437854194.

It is not a de Polignac number, because 491458734569 - 2¹² = 491458730473 is a prime.

It is a super-2 number, since 2×491458734569² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491458734563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87898964 + ... + 87904554.

It is an arithmetic number, because the mean of its divisors is an integer number (33538579200).

Almost surely, 2^491458734569 is an apocalyptic number.

It is an amenable number.

491458734569 is a deficient number, since it is larger than the sum of its proper divisors (45158532631).

491458734569 is a wasteful number, since it uses less digits than its factorization.

491458734569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11332.

The product of its digits is 130636800, while the sum is 65.

The spelling of 491458734569 in words is "four hundred ninety-one billion, four hundred fifty-eight million, seven hundred thirty-four thousand, five hundred sixty-nine".