491278731176 has 16 divisors (see below), whose sum is σ = 922286258100. Its totient is φ = 245335729024.

The previous prime is 491278731173. The next prime is 491278731191. The reversal of 491278731176 is 671137872194.

It can be written as a sum of positive squares in 2 ways, for example, as 478484859076 + 12793872100 = 691726^2 + 113110^2 .

It is not an unprimeable number, because it can be changed into a prime (491278731173) 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, 37947695 + ... + 37960638.

Almost surely, 2^491278731176 is an apocalyptic number.

It is an amenable number.

491278731176 is a deficient number, since it is larger than the sum of its proper divisors (431007526924).

491278731176 is a wasteful number, since it uses less digits than its factorization.

491278731176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75909148 (or 75909144 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 56.

The spelling of 491278731176 in words is "four hundred ninety-one billion, two hundred seventy-eight million, seven hundred thirty-one thousand, one hundred seventy-six".