726645616 has 20 divisors (see below), whose sum is σ = 1408351824. Its totient is φ = 363200000.

The previous prime is 726645599. The next prime is 726645617. The reversal of 726645616 is 616546627.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726645617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58341 + ... + 69691.

Almost surely, 2^726645616 is an apocalyptic number.

It is an amenable number.

726645616 is a deficient number, since it is larger than the sum of its proper divisors (681706208).

726645616 is a wasteful number, since it uses less digits than its factorization.

726645616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15360 (or 15354 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 726645616 is about 26956.3650368517. The cubic root of 726645616 is about 899.0300727834.

The spelling of 726645616 in words is "seven hundred twenty-six million, six hundred forty-five thousand, six hundred sixteen".