491101388803 has 2 divisors, whose sum is σ = 491101388804. Its totient is φ = 491101388802.

The previous prime is 491101388797. The next prime is 491101388819. The reversal of 491101388803 is 308883101194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491101388803 is a prime.

It is not a weakly prime, because it can be changed into another prime (491101388903) by changing a digit.

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 as a sum of consecutive naturals, namely, 245550694401 + 245550694402.

It is an arithmetic number, because the mean of its divisors is an integer number (245550694402).

Almost surely, 2^491101388803 is an apocalyptic number.

491101388803 is a deficient number, since it is larger than the sum of its proper divisors (1).

491101388803 is an equidigital number, since it uses as much as digits as its factorization.

491101388803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 46.

Adding to 491101388803 its reverse (308883101194), we get a palindrome (799984489997).

The spelling of 491101388803 in words is "four hundred ninety-one billion, one hundred one million, three hundred eighty-eight thousand, eight hundred three".