641216055 has 16 divisors (see below), whose sum is σ = 1027409760. Its totient is φ = 341493888.

The previous prime is 641216041. The next prime is 641216087. The reversal of 641216055 is 550612146.

641216055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641216055 - 2²⁵ = 607661623 is a prime.

It is a super-2 number, since 2×641216055² = 822316058379526050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19512 + ... + 40781.

It is an arithmetic number, because the mean of its divisors is an integer number (64213110).

Almost surely, 2^641216055 is an apocalyptic number.

641216055 is a deficient number, since it is larger than the sum of its proper divisors (386193705).

641216055 is a wasteful number, since it uses less digits than its factorization.

641216055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61010.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 641216055 is about 25322.2442725758. The cubic root of 641216055 is about 862.3193454866.

The spelling of 641216055 in words is "six hundred forty-one million, two hundred sixteen thousand, fifty-five".