491522312412 has 72 divisors (see below), whose sum is σ = 1246904568000. Its totient is φ = 163255241088.

The previous prime is 491522312389. The next prime is 491522312419. The reversal of 491522312412 is 214213225194.

491522312412 is a `hidden beast` number, since 4 + 9 + 1 + 5 + 2 + 231 + 2 + 412 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491522312419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18669514 + ... + 18695822.

It is an arithmetic number, because the mean of its divisors is an integer number (17318119000).

Almost surely, 2^491522312412 is an apocalyptic number.

It is an amenable number.

491522312412 is an abundant number, since it is smaller than the sum of its proper divisors (755382255588).

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

491522312412 is a wasteful number, since it uses less digits than its factorization.

491522312412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28155 (or 28150 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 491522312412 in words is "four hundred ninety-one billion, five hundred twenty-two million, three hundred twelve thousand, four hundred twelve".