720605619 has 16 divisors (see below), whose sum is σ = 1067978400. Its totient is φ = 480217248.

The previous prime is 720605603. The next prime is 720605629. The reversal of 720605619 is 916506027.

It is not a de Polignac number, because 720605619 - 2⁴ = 720605603 is a prime.

It is a super-2 number, since 2×720605619² = 1038544916268746322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (720605629) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 126517 + ... + 132089.

It is an arithmetic number, because the mean of its divisors is an integer number (66748650).

Almost surely, 2^720605619 is an apocalyptic number.

720605619 is a deficient number, since it is larger than the sum of its proper divisors (347372781).

720605619 is a wasteful number, since it uses less digits than its factorization.

720605619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371 (or 10365 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 720605619 is about 26844.0984016972. The cubic root of 720605619 is about 896.5321773911.

The spelling of 720605619 in words is "seven hundred twenty million, six hundred five thousand, six hundred nineteen".