913721218832 has 20 divisors (see below), whose sum is σ = 1777680656796. Its totient is φ = 454964920320.

The previous prime is 913721218829. The next prime is 913721218871. The reversal of 913721218832 is 238812127319.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 694682242576 + 219038976256 = 833476^2 + 468016^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118476593 + ... + 118484304.

Almost surely, 2^913721218832 is an apocalyptic number.

It is an amenable number.

913721218832 is a deficient number, since it is larger than the sum of its proper divisors (863959437964).

913721218832 is a wasteful number, since it uses less digits than its factorization.

913721218832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236961146 (or 236961140 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The spelling of 913721218832 in words is "nine hundred thirteen billion, seven hundred twenty-one million, two hundred eighteen thousand, eight hundred thirty-two".