720552945 has 16 divisors (see below), whose sum is σ = 1317582720. Its totient is φ = 329395584.

The previous prime is 720552929. The next prime is 720552949. The reversal of 720552945 is 549255027.

It is not a de Polignac number, because 720552945 - 2⁴ = 720552929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720552949) 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, 3431100 + ... + 3431309.

It is an arithmetic number, because the mean of its divisors is an integer number (82348920).

Almost surely, 2^720552945 is an apocalyptic number.

It is an amenable number.

720552945 is a deficient number, since it is larger than the sum of its proper divisors (597029775).

720552945 is a wasteful number, since it uses less digits than its factorization.

720552945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862424.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 720552945 is about 26843.1172742660. The cubic root of 720552945 is about 896.5103322998.

The spelling of 720552945 in words is "seven hundred twenty million, five hundred fifty-two thousand, nine hundred forty-five".