721903628160 has 768 divisors, whose sum is σ = 2956363038720. Its totient is φ = 160015564800.

The previous prime is 721903628113. The next prime is 721903628183. The reversal of 721903628160 is 61826309127.

721903628160 is a `hidden beast` number, since 7 + 2 + 1 + 9 + 0 + 3 + 628 + 16 + 0 = 666.

It is a super-2 number, since 2×721903628160² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 88129665 + ... + 88137855.

It is an arithmetic number, because the mean of its divisors is an integer number (3849431040).

Almost surely, 2^721903628160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721903628160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478181519360).

721903628160 is an abundant number, since it is smaller than the sum of its proper divisors (2234459410560).

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

721903628160 is a wasteful number, since it uses less digits than its factorization.

721903628160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8347 (or 8332 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 721903628160 in words is "seven hundred twenty-one billion, nine hundred three million, six hundred twenty-eight thousand, one hundred sixty".