491329940412 has 72 divisors (see below), whose sum is σ = 1235493557760. Its totient is φ = 151548395040.

The previous prime is 491329940411. The next prime is 491329940449. The reversal of 491329940412 is 214049923194.

It is a happy number.

It is a super-3 number, since 3×491329940412³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491329940411) 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 23 ways as a sum of consecutive naturals, for example, 161164 + ... + 1004307.

Almost surely, 2^491329940412 is an apocalyptic number.

It is an amenable number.

491329940412 is an abundant number, since it is smaller than the sum of its proper divisors (744163617348).

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

491329940412 is a wasteful number, since it uses less digits than its factorization.

491329940412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165583 (or 1165538 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 491329940412 in words is "four hundred ninety-one billion, three hundred twenty-nine million, nine hundred forty thousand, four hundred twelve".