491577641183 has 8 divisors (see below), whose sum is σ = 512958365568. Its totient is φ = 470197565464.

The previous prime is 491577641167. The next prime is 491577641213. The reversal of 491577641183 is 381146775194.

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

It is a cyclic number.

It is not a de Polignac number, because 491577641183 - 2⁴ = 491577641167 is a prime.

It is a super-2 number, since 2×491577641183² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491577641123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999916 + ... + 2232222.

It is an arithmetic number, because the mean of its divisors is an integer number (64119795696).

Almost surely, 2^491577641183 is an apocalyptic number.

491577641183 is a deficient number, since it is larger than the sum of its proper divisors (21380724385).

491577641183 is a wasteful number, since it uses less digits than its factorization.

491577641183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324333.

The product of its digits is 5080320, while the sum is 56.

The spelling of 491577641183 in words is "four hundred ninety-one billion, five hundred seventy-seven million, six hundred forty-one thousand, one hundred eighty-three".