664141811523723 has 16 divisors (see below), whose sum is σ = 1059599471377440. Its totient is φ = 408702653245152.

The previous prime is 664141811523719. The next prime is 664141811523739. The reversal of 664141811523723 is 327325118141466.

664141811523723 is a `hidden beast` number, since 6 + 6 + 4 + 1 + 41 + 8 + 1 + 1 + 523 + 72 + 3 = 666.

It is not a de Polignac number, because 664141811523723 - 2² = 664141811523719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664141811523723.

It is not an unprimeable number, because it can be changed into a prime (664141811523713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946070956236 + ... + 946070956937.

It is an arithmetic number, because the mean of its divisors is an integer number (66224966961090).

Almost surely, 2^{664141811523723} is an apocalyptic number.

664141811523723 is a deficient number, since it is larger than the sum of its proper divisors (395457659853717).

664141811523723 is a wasteful number, since it uses less digits than its factorization.

664141811523723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892141913195 (or 1892141913189 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 664141811523723 in words is "six hundred sixty-four trillion, one hundred forty-one billion, eight hundred eleven million, five hundred twenty-three thousand, seven hundred twenty-three".