720556264 has 8 divisors (see below), whose sum is σ = 1351043010. Its totient is φ = 360278128.

The previous prime is 720556261. The next prime is 720556267. The reversal of 720556264 is 462655027.

720556264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (720556261) and next prime (720556267).

It can be written as a sum of positive squares in only one way, i.e., 672364900 + 48191364 = 25930^2 + 6942^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (720556261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45034759 + ... + 45034774.

Almost surely, 2^720556264 is an apocalyptic number.

It is an amenable number.

720556264 is a deficient number, since it is larger than the sum of its proper divisors (630486746).

720556264 is a wasteful number, since it uses less digits than its factorization.

720556264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90069539 (or 90069535 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 720556264 is about 26843.1790963738. The cubic root of 720556264 is about 896.5117087951.

The spelling of 720556264 in words is "seven hundred twenty million, five hundred fifty-six thousand, two hundred sixty-four".