721724243801 has 8 divisors (see below), whose sum is σ = 788700078624. Its totient is φ = 654975832320.

The previous prime is 721724243771. The next prime is 721724243809. The reversal of 721724243801 is 108342427127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721724243801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721724243809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56849195 + ... + 56861888.

It is an arithmetic number, because the mean of its divisors is an integer number (98587509828).

Almost surely, 2^721724243801 is an apocalyptic number.

It is an amenable number.

721724243801 is a deficient number, since it is larger than the sum of its proper divisors (66975834823).

721724243801 is a wasteful number, since it uses less digits than its factorization.

721724243801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113711671.

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 721724243801 in words is "seven hundred twenty-one billion, seven hundred twenty-four million, two hundred forty-three thousand, eight hundred one".