491788528439 has 8 divisors (see below), whose sum is σ = 560772439920. Its totient is φ = 427255191936.

The previous prime is 491788528409. The next prime is 491788528453. The reversal of 491788528439 is 934825887194.

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

It is a cyclic number.

It is not a de Polignac number, because 491788528439 - 2¹⁶ = 491788462903 is a prime.

It is a super-2 number, since 2×491788528439² (a number of 24 digits) contains 22 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 (491788528409) 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 7 ways as a sum of consecutive naturals, for example, 1112643509 + ... + 1112643950.

It is an arithmetic number, because the mean of its divisors is an integer number (70096554990).

Almost surely, 2^491788528439 is an apocalyptic number.

491788528439 is a deficient number, since it is larger than the sum of its proper divisors (68983911481).

491788528439 is a wasteful number, since it uses less digits than its factorization.

491788528439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225287489.

The product of its digits is 139345920, while the sum is 68.

The spelling of 491788528439 in words is "four hundred ninety-one billion, seven hundred eighty-eight million, five hundred twenty-eight thousand, four hundred thirty-nine".