641056028366 has 16 divisors (see below), whose sum is σ = 1050137288928. Its totient is φ = 291704800800.

The previous prime is 641056028339. The next prime is 641056028383. The reversal of 641056028366 is 663820650146.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 641056028366.

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, 173631965 + ... + 173635656.

It is an arithmetic number, because the mean of its divisors is an integer number (65633580558).

Almost surely, 2^641056028366 is an apocalyptic number.

641056028366 is a deficient number, since it is larger than the sum of its proper divisors (409081260562).

641056028366 is a wasteful number, since it uses less digits than its factorization.

641056028366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347267707.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 641056028366 in words is "six hundred forty-one billion, fifty-six million, twenty-eight thousand, three hundred sixty-six".