641064500523 has 32 divisors (see below), whose sum is σ = 961572487680. Its totient is φ = 422049388320.

The previous prime is 641064500521. The next prime is 641064500561. The reversal of 641064500523 is 325005460146.

641064500523 is a `hidden beast` number, since 6 + 4 + 1 + 0 + 645 + 0 + 0 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 641064500523 - 2¹ = 641064500521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641064500521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5370913 + ... + 5488973.

It is an arithmetic number, because the mean of its divisors is an integer number (30049140240).

Almost surely, 2^641064500523 is an apocalyptic number.

641064500523 is a deficient number, since it is larger than the sum of its proper divisors (320507987157).

641064500523 is a wasteful number, since it uses less digits than its factorization.

641064500523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120576 (or 120570 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 641064500523 its reverse (325005460146), we get a palindrome (966069960669).

The spelling of 641064500523 in words is "six hundred forty-one billion, sixty-four million, five hundred thousand, five hundred twenty-three".