723444065344721 has 16 divisors (see below), whose sum is σ = 834522457781376. Its totient is φ = 614298013537536.

The previous prime is 723444065344661. The next prime is 723444065344729. The reversal of 723444065344721 is 127443560444327.

It is a cyclic number.

It is not a de Polignac number, because 723444065344721 - 2³⁰ = 723442991602897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (723444065344729) 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, 346147355 + ... + 348231071.

It is an arithmetic number, because the mean of its divisors is an integer number (52157653611336).

Almost surely, 2^{723444065344721} is an apocalyptic number.

It is an amenable number.

723444065344721 is a deficient number, since it is larger than the sum of its proper divisors (111078392436655).

723444065344721 is a wasteful number, since it uses less digits than its factorization.

723444065344721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547368.

The product of its (nonzero) digits is 54190080, while the sum is 56.

The spelling of 723444065344721 in words is "seven hundred twenty-three trillion, four hundred forty-four billion, sixty-five million, three hundred forty-four thousand, seven hundred twenty-one".