491801505330239 has 32 divisors (see below), whose sum is σ = 564949591363584. Its totient is φ = 424593953308800.

The previous prime is 491801505330221. The next prime is 491801505330251. The reversal of 491801505330239 is 932033505108194.

It is not a de Polignac number, because 491801505330239 - 2¹² = 491801505326143 is a prime.

It is a super-3 number, since 3×491801505330239³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491801505330209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1522712 + ... + 31399389.

It is an arithmetic number, because the mean of its divisors is an integer number (17654674730112).

Almost surely, 2^{491801505330239} is an apocalyptic number.

491801505330239 is a deficient number, since it is larger than the sum of its proper divisors (73148086033345).

491801505330239 is a wasteful number, since it uses less digits than its factorization.

491801505330239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32923247.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 491801505330239 in words is "four hundred ninety-one trillion, eight hundred one billion, five hundred five million, three hundred thirty thousand, two hundred thirty-nine".