491177361 has 32 divisors (see below), whose sum is σ = 695623680. Its totient is φ = 307843200.

The previous prime is 491177353. The next prime is 491177363. The reversal of 491177361 is 163771194.

It is not a de Polignac number, because 491177361 - 2³ = 491177353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491177363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 481510 + ... + 482528.

It is an arithmetic number, because the mean of its divisors is an integer number (21738240).

Almost surely, 2^491177361 is an apocalyptic number.

It is an amenable number.

491177361 is a deficient number, since it is larger than the sum of its proper divisors (204446319).

491177361 is a wasteful number, since it uses less digits than its factorization.

491177361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197.

The product of its digits is 31752, while the sum is 39.

The square root of 491177361 is about 22162.5215397526. The cubic root of 491177361 is about 789.0044399859.

The spelling of 491177361 in words is "four hundred ninety-one million, one hundred seventy-seven thousand, three hundred sixty-one".