491790841793 has 16 divisors (see below), whose sum is σ = 509759585280. Its totient is φ = 473957697600.

The previous prime is 491790841771. The next prime is 491790841847. The reversal of 491790841793 is 397148097194.

It is a cyclic number.

It is not a de Polignac number, because 491790841793 - 2¹⁸ = 491790579649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491790841093) 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, 7329071 + ... + 7395867.

It is an arithmetic number, because the mean of its divisors is an integer number (31859974080).

Almost surely, 2^491790841793 is an apocalyptic number.

It is an amenable number.

491790841793 is a deficient number, since it is larger than the sum of its proper divisors (17968743487).

491790841793 is a wasteful number, since it uses less digits than its factorization.

491790841793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67808.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 491790841793 in words is "four hundred ninety-one billion, seven hundred ninety million, eight hundred forty-one thousand, seven hundred ninety-three".