641207144220 has 48 divisors (see below), whose sum is σ = 1857289664160. Its totient is φ = 165092413696.

The previous prime is 641207144213. The next prime is 641207144257. The reversal of 641207144220 is 22441702146.

641207144220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641207144220² (a number of 24 digits) 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, 184253187 + ... + 184256666.

It is an arithmetic number, because the mean of its divisors is an integer number (38693534670).

Almost surely, 2^641207144220 is an apocalyptic number.

641207144220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641207144220 is an abundant number, since it is smaller than the sum of its proper divisors (1216082519940).

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

641207144220 is a wasteful number, since it uses less digits than its factorization.

641207144220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368509894 (or 368509892 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

Adding to 641207144220 its reverse (22441702146), we get a palindrome (663648846366).

The spelling of 641207144220 in words is "six hundred forty-one billion, two hundred seven million, one hundred forty-four thousand, two hundred twenty".