720055505 has 8 divisors (see below), whose sum is σ = 930533352. Its totient is φ = 531733248.

The previous prime is 720055493. The next prime is 720055513. The reversal of 720055505 is 505550027.

It can be written as a sum of positive squares in 4 ways, for example, as 528529 + 719526976 = 727^2 + 26824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720055505 - 2¹⁰ = 720054481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5538824 + ... + 5538953.

It is an arithmetic number, because the mean of its divisors is an integer number (116316669).

Almost surely, 2^720055505 is an apocalyptic number.

It is an amenable number.

720055505 is a deficient number, since it is larger than the sum of its proper divisors (210477847).

720055505 is a wasteful number, since it uses less digits than its factorization.

720055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11077795.

The product of its (nonzero) digits is 8750, while the sum is 29.

The square root of 720055505 is about 26833.8499846742. The cubic root of 720055505 is about 896.3039802354.

The spelling of 720055505 in words is "seven hundred twenty million, fifty-five thousand, five hundred five".