491618910 has 32 divisors (see below), whose sum is σ = 1196508672. Its totient is φ = 129251360.

The previous prime is 491618899. The next prime is 491618923. The reversal of 491618910 is 19816194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113274 + ... + 117533.

It is an arithmetic number, because the mean of its divisors is an integer number (37390896).

Almost surely, 2^491618910 is an apocalyptic number.

491618910 is an abundant number, since it is smaller than the sum of its proper divisors (704889762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491618910 is a wasteful number, since it uses less digits than its factorization.

491618910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230888.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 491618910 is about 22172.4809166679. The cubic root of 491618910 is about 789.2407970921.

It can be divided in two parts, 491618 and 910, that added together give a triangular number (492528 = T₉₉₂).

The spelling of 491618910 in words is "four hundred ninety-one million, six hundred eighteen thousand, nine hundred ten".