641928055 has 16 divisors (see below), whose sum is σ = 788959584. Its totient is φ = 501258240.

The previous prime is 641928019. The next prime is 641928149. The reversal of 641928055 is 550829146.

641928055 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 641928055 - 2¹¹ = 641926007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641927999 and 641928017.

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, 26340 + ... + 44470.

It is an arithmetic number, because the mean of its divisors is an integer number (49309974).

Almost surely, 2^641928055 is an apocalyptic number.

641928055 is a deficient number, since it is larger than the sum of its proper divisors (147031529).

641928055 is a wasteful number, since it uses less digits than its factorization.

641928055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18306.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 641928055 is about 25336.2991575329. The cubic root of 641928055 is about 862.6383977311.

The spelling of 641928055 in words is "six hundred forty-one million, nine hundred twenty-eight thousand, fifty-five".