641606504975 has 48 divisors (see below), whose sum is σ = 812309437440. Its totient is φ = 502574640000.

The previous prime is 641606504893. The next prime is 641606504993. The reversal of 641606504975 is 579405606146.

It is not a de Polignac number, because 641606504975 - 2¹⁸ = 641606242831 is a prime.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 723343982 + ... + 723344868.

It is an arithmetic number, because the mean of its divisors is an integer number (16923113280).

Almost surely, 2^641606504975 is an apocalyptic number.

641606504975 is a deficient number, since it is larger than the sum of its proper divisors (170702932465).

641606504975 is a wasteful number, since it uses less digits than its factorization.

641606504975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 641606504975 in words is "six hundred forty-one billion, six hundred six million, five hundred four thousand, nine hundred seventy-five".