491110000101 has 56 divisors (see below), whose sum is σ = 857396067840. Its totient is φ = 275339147616.

The previous prime is 491110000091. The next prime is 491110000127. The reversal of 491110000101 is 101000011194.

It is not a de Polignac number, because 491110000101 - 2¹⁴ = 491109983717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491110000181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 637461 + ... + 1178378.

Almost surely, 2^491110000101 is an apocalyptic number.

It is an amenable number.

491110000101 is a deficient number, since it is larger than the sum of its proper divisors (366286067739).

491110000101 is an equidigital number, since it uses as much as digits as its factorization.

491110000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815917 (or 1815902 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 491110000101 its reverse (101000011194), we get a palindrome (592110011295).

The spelling of 491110000101 in words is "four hundred ninety-one billion, one hundred ten million, one hundred one", and thus it is an aban number.