641102642450 has 12 divisors (see below), whose sum is σ = 1192450915050. Its totient is φ = 256441056960.

The previous prime is 641102642447. The next prime is 641102642473. The reversal of 641102642450 is 54246201146.

It can be written as a sum of positive squares in 3 ways, for example, as 393867952921 + 247234689529 = 627589^2 + 497227^2 .

It is a super-2 number, since 2×641102642450² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641102642450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6411026375 + ... + 6411026474.

Almost surely, 2^641102642450 is an apocalyptic number.

641102642450 is a deficient number, since it is larger than the sum of its proper divisors (551348272600).

641102642450 is a wasteful number, since it uses less digits than its factorization.

641102642450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822052861 (or 12822052856 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 641102642450 its reverse (54246201146), we get a palindrome (695348843596).

The spelling of 641102642450 in words is "six hundred forty-one billion, one hundred two million, six hundred forty-two thousand, four hundred fifty".