720605625 has 40 divisors (see below), whose sum is σ = 1217760192. Its totient is φ = 378840000.

The previous prime is 720605603. The next prime is 720605629. The reversal of 720605625 is 526506027.

It is not a de Polignac number, because 720605625 - 2⁵ = 720605593 is a prime.

It is a Curzon number.

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 39 ways as a sum of consecutive naturals, for example, 130419 + ... + 135831.

Almost surely, 2^720605625 is an apocalyptic number.

720605625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

720605625 is a deficient number, since it is larger than the sum of its proper divisors (497154567).

720605625 is an equidigital number, since it uses as much as digits as its factorization.

720605625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507 (or 5492 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 720605625 is about 26844.0985134536. The cubic root of 720605625 is about 896.5321798794.

The spelling of 720605625 in words is "seven hundred twenty million, six hundred five thousand, six hundred twenty-five".