491111144 has 32 divisors (see below), whose sum is σ = 940380840. Its totient is φ = 240364800.

The previous prime is 491111123. The next prime is 491111171. The reversal of 491111144 is 441111194.

It can be written as a sum of positive squares in 4 ways, for example, as 490091044 + 1020100 = 22138^2 + 1010^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228314 + ... + 230454.

Almost surely, 2^491111144 is an apocalyptic number.

It is an amenable number.

491111144 is a deficient number, since it is larger than the sum of its proper divisors (449269696).

491111144 is a wasteful number, since it uses less digits than its factorization.

491111144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2737 counting only the distinct ones).

The product of its digits is 576, while the sum is 26.

The square root of 491111144 is about 22161.0275935030. The cubic root of 491111144 is about 788.9689824240.

The spelling of 491111144 in words is "four hundred ninety-one million, one hundred eleven thousand, one hundred forty-four".