491118825 has 12 divisors (see below), whose sum is σ = 811983248. Its totient is φ = 261930000.

The previous prime is 491118809. The next prime is 491118841. The reversal of 491118825 is 528811194.

It is an interprime number because it is at equal distance from previous prime (491118809) and next prime (491118841).

It is not a de Polignac number, because 491118825 - 2⁴ = 491118809 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3274051 + ... + 3274200.

Almost surely, 2^491118825 is an apocalyptic number.

It is an amenable number.

491118825 is a deficient number, since it is larger than the sum of its proper divisors (320864423).

491118825 is a wasteful number, since it uses less digits than its factorization.

491118825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6548264 (or 6548259 counting only the distinct ones).

The product of its digits is 23040, while the sum is 39.

The square root of 491118825 is about 22161.2008925509. The cubic root of 491118825 is about 788.9730955725.

It can be divided in two parts, 491 and 118825, that added together give a triangular number (119316 = T₄₈₈).

The spelling of 491118825 in words is "four hundred ninety-one million, one hundred eighteen thousand, eight hundred twenty-five".