726587025728 has 56 divisors (see below), whose sum is σ = 1443771229800. Its totient is φ = 362802585600.

The previous prime is 726587025707. The next prime is 726587025797. The reversal of 726587025728 is 827520785627.

It can be written as a sum of positive squares in 4 ways, for example, as 209039155264 + 517547870464 = 457208^2 + 719408^2 .

It is a super-2 number, since 2×726587025728² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 285046598 + ... + 285049146.

Almost surely, 2^726587025728 is an apocalyptic number.

It is an amenable number.

726587025728 is a deficient number, since it is larger than the sum of its proper divisors (717184204072).

726587025728 is a wasteful number, since it uses less digits than its factorization.

726587025728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6835 (or 6825 counting only the distinct ones).

The product of its (nonzero) digits is 26342400, while the sum is 59.

The spelling of 726587025728 in words is "seven hundred twenty-six billion, five hundred eighty-seven million, twenty-five thousand, seven hundred twenty-eight".