721310294016 has 168 divisors, whose sum is σ = 2243942484420. Its totient is φ = 221941334016.

The previous prime is 721310293999. The next prime is 721310294021. The reversal of 721310294016 is 610492013127.

721310294016 is a `hidden beast` number, since 7 + 213 + 10 + 29 + 401 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 550112956416 + 171197337600 = 741696^2 + 413760^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 582180 + ... + 1334748.

Almost surely, 2^721310294016 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 721310294016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121971242210).

721310294016 is an abundant number, since it is smaller than the sum of its proper divisors (1522632190404).

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

721310294016 is a wasteful number, since it uses less digits than its factorization.

721310294016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752614 (or 752587 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 721310294016 in words is "seven hundred twenty-one billion, three hundred ten million, two hundred ninety-four thousand, sixteen".