491163177 has 4 divisors (see below), whose sum is σ = 654884240. Its totient is φ = 327442116.

The previous prime is 491163151. The next prime is 491163181. The reversal of 491163177 is 771361194.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 491163177 - 2⁸ = 491162921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491163107) 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, 81860527 + ... + 81860532.

It is an arithmetic number, because the mean of its divisors is an integer number (163721060).

Almost surely, 2^491163177 is an apocalyptic number.

It is an amenable number.

491163177 is a deficient number, since it is larger than the sum of its proper divisors (163721063).

491163177 is a wasteful number, since it uses less digits than its factorization.

491163177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163721062.

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

The square root of 491163177 is about 22162.2015377534. The cubic root of 491163177 is about 788.9968450737.

The spelling of 491163177 in words is "four hundred ninety-one million, one hundred sixty-three thousand, one hundred seventy-seven".