491259370133 has 16 divisors (see below), whose sum is σ = 567662331264. Its totient is φ = 416418831360.

The previous prime is 491259370109. The next prime is 491259370171. The reversal of 491259370133 is 331073952194.

It is not a de Polignac number, because 491259370133 - 2¹⁰ = 491259369109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491259370103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610673 + ... + 1164233.

It is an arithmetic number, because the mean of its divisors is an integer number (35478895704).

Almost surely, 2^491259370133 is an apocalyptic number.

It is an amenable number.

491259370133 is a deficient number, since it is larger than the sum of its proper divisors (76402961131).

491259370133 is a wasteful number, since it uses less digits than its factorization.

491259370133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554972.

The product of its (nonzero) digits is 612360, while the sum is 47.

The spelling of 491259370133 in words is "four hundred ninety-one billion, two hundred fifty-nine million, three hundred seventy thousand, one hundred thirty-three".