721739482916 has 6 divisors (see below), whose sum is σ = 1263044095110. Its totient is φ = 360869741456.

The previous prime is 721739482873. The next prime is 721739482921. The reversal of 721739482916 is 619284937127.

It can be written as a sum of positive squares in only one way, i.e., 640166410816 + 81573072100 = 800104^2 + 285610^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90217435361 + ... + 90217435368.

It is an arithmetic number, because the mean of its divisors is an integer number (210507349185).

Almost surely, 2^721739482916 is an apocalyptic number.

It is an amenable number.

721739482916 is a deficient number, since it is larger than the sum of its proper divisors (541304612194).

721739482916 is a wasteful number, since it uses less digits than its factorization.

721739482916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180434870733 (or 180434870731 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 59.

The spelling of 721739482916 in words is "seven hundred twenty-one billion, seven hundred thirty-nine million, four hundred eighty-two thousand, nine hundred sixteen".