491934352912 has 20 divisors (see below), whose sum is σ = 954582435180. Its totient is φ = 245590498688.

The previous prime is 491934352859. The next prime is 491934352913. The reversal of 491934352912 is 219253439194.

It can be written as a sum of positive squares in 2 ways, for example, as 134158108176 + 357776244736 = 366276^2 + 598144^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 491934352912.

It is not an unprimeable number, because it can be changed into a prime (491934352913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23531587 + ... + 23552482.

It is an arithmetic number, because the mean of its divisors is an integer number (47729121759).

Almost surely, 2^491934352912 is an apocalyptic number.

It is an amenable number.

491934352912 is a deficient number, since it is larger than the sum of its proper divisors (462648082268).

491934352912 is a wasteful number, since it uses less digits than its factorization.

491934352912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47084730 (or 47084724 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 52.

The spelling of 491934352912 in words is "four hundred ninety-one billion, nine hundred thirty-four million, three hundred fifty-two thousand, nine hundred twelve".