721316160 has 168 divisors, whose sum is σ = 2494885536. Its totient is φ = 191278080.

The previous prime is 721316149. The next prime is 721316173. The reversal of 721316160 is 61613127.

721316160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 607087 + ... + 608273.

Almost surely, 2^721316160 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 721316160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1247442768).

721316160 is an abundant number, since it is smaller than the sum of its proper divisors (1773569376).

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

721316160 is a wasteful number, since it uses less digits than its factorization.

721316160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421 (or 1408 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 721316160 is about 26857.3297257937. The cubic root of 721316160 is about 896.8267507299.

Adding to 721316160 its reverse (61613127), we get a palindrome (782929287).

The spelling of 721316160 in words is "seven hundred twenty-one million, three hundred sixteen thousand, one hundred sixty".