721543043233068 has 48 divisors (see below), whose sum is σ = 1924337766247680. Its totient is φ = 206131264035264.

The previous prime is 721543043233013. The next prime is 721543043233069. The reversal of 721543043233068 is 860332340345127.

It is a self number, because there is not a number n which added to its sum of digits gives 721543043233068.

It is not an unprimeable number, because it can be changed into a prime (721543043233069) 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, 497003646 + ... + 498453317.

It is an arithmetic number, because the mean of its divisors is an integer number (40090370130160).

Almost surely, 2^{721543043233068} is an apocalyptic number.

It is an amenable number.

721543043233068 is an abundant number, since it is smaller than the sum of its proper divisors (1202794723014612).

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

721543043233068 is a wasteful number, since it uses less digits than its factorization.

721543043233068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995465606 (or 995465604 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 51.

The spelling of 721543043233068 in words is "seven hundred twenty-one trillion, five hundred forty-three billion, forty-three million, two hundred thirty-three thousand, sixty-eight".