491201241019 has 4 divisors (see below), whose sum is σ = 491443333360. Its totient is φ = 490959148680.

The previous prime is 491201241007. The next prime is 491201241023. The reversal of 491201241019 is 910142102194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491201241019 - 2¹¹ = 491201238971 is a prime.

It is a super-2 number, since 2×491201241019² (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 (491201241059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121043127 + ... + 121047184.

It is an arithmetic number, because the mean of its divisors is an integer number (122860833340).

Almost surely, 2^491201241019 is an apocalyptic number.

491201241019 is a deficient number, since it is larger than the sum of its proper divisors (242092341).

491201241019 is a wasteful number, since it uses less digits than its factorization.

491201241019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242092340.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 491201241019 in words is "four hundred ninety-one billion, two hundred one million, two hundred forty-one thousand, nineteen".