491617333012 has 48 divisors (see below), whose sum is σ = 964891242000. Its totient is φ = 217605749760.

The previous prime is 491617332991. The next prime is 491617333013. The reversal of 491617333012 is 210333716194.

It can be written as a sum of positive squares in 8 ways, for example, as 133455779856 + 358161553156 = 365316^2 + 598466^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491617333013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869289 + ... + 1318672.

It is an arithmetic number, because the mean of its divisors is an integer number (20101900875).

Almost surely, 2^491617333012 is an apocalyptic number.

It is an amenable number.

491617333012 is a deficient number, since it is larger than the sum of its proper divisors (473273908988).

491617333012 is a wasteful number, since it uses less digits than its factorization.

491617333012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188156 (or 2188154 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 491617333012 in words is "four hundred ninety-one billion, six hundred seventeen million, three hundred thirty-three thousand, twelve".