720555264 has 360 divisors, whose sum is σ = 2534576352. Its totient is φ = 201553920.

The previous prime is 720555229. The next prime is 720555301. The reversal of 720555264 is 462555027.

It is a super-3 number, since 3×720555264³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55427322 + ... + 55427334.

Almost surely, 2^720555264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720555264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1267288176).

720555264 is an abundant number, since it is smaller than the sum of its proper divisors (1814021088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720555264 is an frugal number, since it uses more digits than its factorization.

720555264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 720555264 is about 26843.1604696615. The cubic root of 720555264 is about 896.5112940637.

The spelling of 720555264 in words is "seven hundred twenty million, five hundred fifty-five thousand, two hundred sixty-four".