491311709403 has 8 divisors (see below), whose sum is σ = 655100125968. Its totient is φ = 327532216224.

The previous prime is 491311709377. The next prime is 491311709411. The reversal of 491311709403 is 304907113194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491311709403 - 2¹⁰ = 491311708379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491311709453) 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 7 ways as a sum of consecutive naturals, for example, 2101300 + ... + 2323377.

It is an arithmetic number, because the mean of its divisors is an integer number (81887515746).

Almost surely, 2^491311709403 is an apocalyptic number.

491311709403 is a deficient number, since it is larger than the sum of its proper divisors (163788416565).

491311709403 is a wasteful number, since it uses less digits than its factorization.

491311709403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461693.

The product of its (nonzero) digits is 81648, while the sum is 42.

The spelling of 491311709403 in words is "four hundred ninety-one billion, three hundred eleven million, seven hundred nine thousand, four hundred three".