641430784488208 has 160 divisors (see below), whose sum is σ = 1462468458528000. Its totient is φ = 268684523366400.

The previous prime is 641430784488191. The next prime is 641430784488251. The reversal of 641430784488208 is 802884487034146.

It is a super-2 number, since 2×641430784488208² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3396073198 + ... + 3396262066.

It is an arithmetic number, because the mean of its divisors is an integer number (9140427865800).

Almost surely, 2^{641430784488208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641430784488208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731234229264000).

641430784488208 is an abundant number, since it is smaller than the sum of its proper divisors (821037674039792).

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

641430784488208 is a wasteful number, since it uses less digits than its factorization.

641430784488208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191361 (or 191355 counting only the distinct ones).

The product of its (nonzero) digits is 264241152, while the sum is 67.

The spelling of 641430784488208 in words is "six hundred forty-one trillion, four hundred thirty billion, seven hundred eighty-four million, four hundred eighty-eight thousand, two hundred eight".