491105502 has 48 divisors (see below), whose sum is σ = 1123171920. Its totient is φ = 154656000.

The previous prime is 491105467. The next prime is 491105539. The reversal of 491105502 is 205501194.

491105502 is a `hidden beast` number, since 49 + 110 + 5 + 502 = 666.

It is a super-2 number, since 2×491105502² = 482369228189344008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135352 + ... + 138932.

It is an arithmetic number, because the mean of its divisors is an integer number (23399415).

Almost surely, 2^491105502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491105502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561585960).

491105502 is an abundant number, since it is smaller than the sum of its proper divisors (632066418).

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

491105502 is a wasteful number, since it uses less digits than its factorization.

491105502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009 (or 4006 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 491105502 is about 22160.9002975962. The cubic root of 491105502 is about 788.9659611256.

Adding to 491105502 its reverse (205501194), we get a palindrome (696606696).

The spelling of 491105502 in words is "four hundred ninety-one million, one hundred five thousand, five hundred two".