721243324732 has 12 divisors (see below), whose sum is σ = 1442486649520. Its totient is φ = 309104282016.

The previous prime is 721243324619. The next prime is 721243324751. The reversal of 721243324732 is 237423342127.

721243324732 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12879345057 + ... + 12879345112.

Almost surely, 2^721243324732 is an apocalyptic number.

It is an amenable number.

721243324732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

721243324732 is a wasteful number, since it uses less digits than its factorization.

721243324732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25758690180 (or 25758690178 counting only the distinct ones).

The product of its digits is 338688, while the sum is 40.

Adding to 721243324732 its reverse (237423342127), we get a palindrome (958666666859).

The spelling of 721243324732 in words is "seven hundred twenty-one billion, two hundred forty-three million, three hundred twenty-four thousand, seven hundred thirty-two".