721757145301216 has 24 divisors (see below), whose sum is σ = 1421523029070144. Its totient is φ = 360735423632640.

The previous prime is 721757145301207. The next prime is 721757145301289. The reversal of 721757145301216 is 612103541757127.

It is a congruent number.

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, 4473324880 + ... + 4473486223.

It is an arithmetic number, because the mean of its divisors is an integer number (59230126211256).

Almost surely, 2^{721757145301216} is an apocalyptic number.

It is an amenable number.

721757145301216 is a deficient number, since it is larger than the sum of its proper divisors (699765883768928).

721757145301216 is a wasteful number, since it uses less digits than its factorization.

721757145301216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946813634 (or 8946813626 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 52.

The spelling of 721757145301216 in words is "seven hundred twenty-one trillion, seven hundred fifty-seven billion, one hundred forty-five million, three hundred one thousand, two hundred sixteen".