491331650 has 12 divisors (see below), whose sum is σ = 913876962. Its totient is φ = 196532640.

The previous prime is 491331629. The next prime is 491331661. The reversal of 491331650 is 56133194.

It can be written as a sum of positive squares in 3 ways, for example, as 268337161 + 222994489 = 16381^2 + 14933^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4913267 + ... + 4913366.

Almost surely, 2^491331650 is an apocalyptic number.

491331650 is a deficient number, since it is larger than the sum of its proper divisors (422545312).

491331650 is a wasteful number, since it uses less digits than its factorization.

491331650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9826645 (or 9826640 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 491331650 is about 22166.0021203644. The cubic root of 491331650 is about 789.0870455587.

It can be divided in two parts, 4913 and 31650, that added together give a palindrome (36563).

The spelling of 491331650 in words is "four hundred ninety-one million, three hundred thirty-one thousand, six hundred fifty".