721714394980 has 24 divisors (see below), whose sum is σ = 1604753184888. Its totient is φ = 271704242688.

The previous prime is 721714394977. The next prime is 721714395001. The reversal of 721714394980 is 89493417127.

It can be written as a sum of positive squares in 4 ways, for example, as 341560762624 + 380153632356 = 584432^2 + 616566^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061344359 + ... + 1061345038.

It is an arithmetic number, because the mean of its divisors is an integer number (66864716037).

Almost surely, 2^721714394980 is an apocalyptic number.

It is an amenable number.

721714394980 is an abundant number, since it is smaller than the sum of its proper divisors (883038789908).

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

721714394980 is a wasteful number, since it uses less digits than its factorization.

721714394980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122689423 (or 2122689421 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 721714394980 in words is "seven hundred twenty-one billion, seven hundred fourteen million, three hundred ninety-four thousand, nine hundred eighty".