491729646032 has 20 divisors (see below), whose sum is σ = 1008768906756. Its totient is φ = 231402186240.

The previous prime is 491729646029. The next prime is 491729646137. The reversal of 491729646032 is 230646927194.

It can be written as a sum of positive squares in 2 ways, for example, as 287591948176 + 204137697856 = 536276^2 + 451816^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 903914519 + ... + 903915062.

Almost surely, 2^491729646032 is an apocalyptic number.

It is an amenable number.

491729646032 is an abundant number, since it is smaller than the sum of its proper divisors (517039260724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491729646032 is a wasteful number, since it uses less digits than its factorization.

491729646032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807829606 (or 1807829600 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 491729646032 in words is "four hundred ninety-one billion, seven hundred twenty-nine million, six hundred forty-six thousand, thirty-two".