491165944 has 32 divisors (see below), whose sum is σ = 932153040. Its totient is φ = 242611200.

The previous prime is 491165911. The next prime is 491165951. The reversal of 491165944 is 449561194.

It is a super-2 number, since 2×491165944² = 482487969090822272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491165944.

It is a congruent number.

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, 234984 + ... + 237064.

Almost surely, 2^491165944 is an apocalyptic number.

It is an amenable number.

491165944 is a deficient number, since it is larger than the sum of its proper divisors (440987096).

491165944 is a wasteful number, since it uses less digits than its factorization.

491165944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431 (or 2427 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 491165944 is about 22162.2639637741. The cubic root of 491165944 is about 788.9983266928.

The spelling of 491165944 in words is "four hundred ninety-one million, one hundred sixty-five thousand, nine hundred forty-four".