720555263 has 4 divisors (see below), whose sum is σ = 721166568. Its totient is φ = 719943960.

The previous prime is 720555229. The next prime is 720555301. The reversal of 720555263 is 362555027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362555027 = 307 ⋅1180961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720555263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720555223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303881 + ... + 306242.

It is an arithmetic number, because the mean of its divisors is an integer number (180291642).

Almost surely, 2^720555263 is an apocalyptic number.

720555263 is a deficient number, since it is larger than the sum of its proper divisors (611305).

720555263 is a wasteful number, since it uses less digits than its factorization.

720555263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611304.

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 720555263 is about 26843.1604510348. The cubic root of 720555263 is about 896.5112936489.

The spelling of 720555263 in words is "seven hundred twenty million, five hundred fifty-five thousand, two hundred sixty-three".