641305544406 has 64 divisors (see below), whose sum is σ = 1346264119296. Its totient is φ = 203394643200.

The previous prime is 641305544357. The next prime is 641305544413. The reversal of 641305544406 is 604445503146.

It is a super-2 number, since 2×641305544406² (a number of 24 digits) contains 22 as substring.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 29863285 + ... + 29884751.

It is an arithmetic number, because the mean of its divisors is an integer number (21035376864).

Almost surely, 2^641305544406 is an apocalyptic number.

641305544406 is an abundant number, since it is smaller than the sum of its proper divisors (704958574890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641305544406 is a wasteful number, since it uses less digits than its factorization.

641305544406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24197.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 641305544406 in words is "six hundred forty-one billion, three hundred five million, five hundred forty-four thousand, four hundred six".