491478875359 has 4 divisors (see below), whose sum is σ = 491485883200. Its totient is φ = 491471867520.

The previous prime is 491478875347. The next prime is 491478875369. The reversal of 491478875359 is 953578874194.

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 491478875359 - 2¹¹ = 491478873311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491478875369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3397647 + ... + 3539344.

It is an arithmetic number, because the mean of its divisors is an integer number (122871470800).

Almost surely, 2^491478875359 is an apocalyptic number.

491478875359 is a deficient number, since it is larger than the sum of its proper divisors (7007841).

491478875359 is an equidigital number, since it uses as much as digits as its factorization.

491478875359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007840.

The product of its digits is 304819200, while the sum is 70.

The spelling of 491478875359 in words is "four hundred ninety-one billion, four hundred seventy-eight million, eight hundred seventy-five thousand, three hundred fifty-nine".