721116055 has 8 divisors (see below), whose sum is σ = 944006544. Its totient is φ = 524448000.

The previous prime is 721116049. The next prime is 721116083. The reversal of 721116055 is 550611127.

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

It is not a de Polignac number, because 721116055 - 2⁹ = 721115543 is a prime.

It is a Duffinian number.

It is a congruent 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, 6555546 + ... + 6555655.

It is an arithmetic number, because the mean of its divisors is an integer number (118000818).

Almost surely, 2^721116055 is an apocalyptic number.

721116055 is a deficient number, since it is larger than the sum of its proper divisors (222890489).

721116055 is a wasteful number, since it uses less digits than its factorization.

721116055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111217.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 721116055 is about 26853.6041342685. The cubic root of 721116055 is about 896.7438115489.

The spelling of 721116055 in words is "seven hundred twenty-one million, one hundred sixteen thousand, fifty-five".