720567616 has 28 divisors (see below), whose sum is σ = 1431196020. Its totient is φ = 359951360.

The previous prime is 720567607. The next prime is 720567619. The reversal of 720567616 is 616765027.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 533425216 + 187142400 = 23096^2 + 13680^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720567619) 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, 74076 + ... + 83236.

Almost surely, 2^720567616 is an apocalyptic number.

It is an amenable number.

720567616 is a deficient number, since it is larger than the sum of its proper divisors (710628404).

720567616 is a wasteful number, since it uses less digits than its factorization.

720567616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10402 (or 10392 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 720567616 is about 26843.3905459053. The cubic root of 720567616 is about 896.5164168001.

The spelling of 720567616 in words is "seven hundred twenty million, five hundred sixty-seven thousand, six hundred sixteen".