491273156 has 12 divisors (see below), whose sum is σ = 937885200. Its totient is φ = 223305960.

The previous prime is 491273149. The next prime is 491273171. The reversal of 491273156 is 651372194.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5582606 + ... + 5582693.

It is an arithmetic number, because the mean of its divisors is an integer number (78157100).

Almost surely, 2^491273156 is an apocalyptic number.

It is an amenable number.

491273156 is a deficient number, since it is larger than the sum of its proper divisors (446612044).

491273156 is a wasteful number, since it uses less digits than its factorization.

491273156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11165314 (or 11165312 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 491273156 is about 22164.6826280008. The cubic root of 491273156 is about 789.0557301940.

The spelling of 491273156 in words is "four hundred ninety-one million, two hundred seventy-three thousand, one hundred fifty-six".