641102642451 has 16 divisors (see below), whose sum is σ = 949878971520. Its totient is φ = 427357986120.

The previous prime is 641102642447. The next prime is 641102642473. The reversal of 641102642451 is 154246201146.

641102642451 is a `hidden beast` number, since 6 + 4 + 1 + 1 + 0 + 2 + 642 + 4 + 5 + 1 = 666.

641102642451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641102642451 - 2² = 641102642447 is a prime.

It is a super-2 number, since 2×641102642451² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641102642491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946405 + ... + 1475766.

It is an arithmetic number, because the mean of its divisors is an integer number (59367435720).

Almost surely, 2^641102642451 is an apocalyptic number.

641102642451 is a deficient number, since it is larger than the sum of its proper divisors (308776329069).

641102642451 is a wasteful number, since it uses less digits than its factorization.

641102642451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431983 (or 2431977 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 641102642451 its reverse (154246201146), we get a palindrome (795348843597).

The spelling of 641102642451 in words is "six hundred forty-one billion, one hundred two million, six hundred forty-two thousand, four hundred fifty-one".