721560512016 has 40 divisors (see below), whose sum is σ = 2071145915360. Its totient is φ = 240520170528.

The previous prime is 721560512011. The next prime is 721560512021. The reversal of 721560512016 is 610215065127.

721560512016 is a `hidden beast` number, since 7 + 2 + 15 + 605 + 1 + 20 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (721560512011) and next prime (721560512021).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (721560512011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835139050 + ... + 835139913.

It is an arithmetic number, because the mean of its divisors is an integer number (51778647884).

Almost surely, 2^721560512016 is an apocalyptic number.

It is an amenable number.

721560512016 is an abundant number, since it is smaller than the sum of its proper divisors (1349585403344).

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

721560512016 is a wasteful number, since it uses less digits than its factorization.

721560512016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670278980 (or 1670278968 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 721560512016 in words is "seven hundred twenty-one billion, five hundred sixty million, five hundred twelve thousand, sixteen".