726561039412 has 36 divisors (see below), whose sum is σ = 1380897601356. Its totient is φ = 334340697600.

The previous prime is 726561039389. The next prime is 726561039517. The reversal of 726561039412 is 214930165627.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 365400906256 + 361160133156 = 604484^2 + 600966^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1366839 + ... + 1822462.

Almost surely, 2^726561039412 is an apocalyptic number.

It is an amenable number.

726561039412 is a deficient number, since it is larger than the sum of its proper divisors (654336561944).

726561039412 is a wasteful number, since it uses less digits than its factorization.

726561039412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189668 (or 3189653 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 726561039412 in words is "seven hundred twenty-six billion, five hundred sixty-one million, thirty-nine thousand, four hundred twelve".