641617132445 has 16 divisors (see below), whose sum is σ = 796522671360. Its totient is φ = 495573739584.

The previous prime is 641617132433. The next prime is 641617132463. The reversal of 641617132445 is 544231716146.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641617132445 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 641617132396 and 641617132405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4176974 + ... + 4327856.

It is an arithmetic number, because the mean of its divisors is an integer number (49782666960).

Almost surely, 2^641617132445 is an apocalyptic number.

It is an amenable number.

641617132445 is a deficient number, since it is larger than the sum of its proper divisors (154905538915).

641617132445 is a wasteful number, since it uses less digits than its factorization.

641617132445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180244.

The product of its digits is 483840, while the sum is 44.

The spelling of 641617132445 in words is "six hundred forty-one billion, six hundred seventeen million, one hundred thirty-two thousand, four hundred forty-five".