720172055 has 8 divisors (see below), whose sum is σ = 865276944. Its totient is φ = 575424000.

The previous prime is 720172049. The next prime is 720172073. The reversal of 720172055 is 550271027.

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

It is not a de Polignac number, because 720172055 - 2²⁰ = 719123479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 84746 + ... + 92855.

It is an arithmetic number, because the mean of its divisors is an integer number (108159618).

Almost surely, 2^720172055 is an apocalyptic number.

720172055 is a deficient number, since it is larger than the sum of its proper divisors (145104889).

720172055 is a wasteful number, since it uses less digits than its factorization.

720172055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178417.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 720172055 is about 26836.0215941186. The cubic root of 720172055 is about 896.3523369674.

The spelling of 720172055 in words is "seven hundred twenty million, one hundred seventy-two thousand, fifty-five".