664500050010523 has 4 divisors (see below), whose sum is σ = 665487420070648. Its totient is φ = 663512679950400.

The previous prime is 664500050010493. The next prime is 664500050010569. The reversal of 664500050010523 is 325010050005466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664500050010523 - 2¹³ = 664500050002331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664500050010023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493685029053 + ... + 493685030398.

It is an arithmetic number, because the mean of its divisors is an integer number (166371855017662).

Almost surely, 2^{664500050010523} is an apocalyptic number.

664500050010523 is a deficient number, since it is larger than the sum of its proper divisors (987370060125).

664500050010523 is an equidigital number, since it uses as much as digits as its factorization.

664500050010523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987370060124.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 664500050010523 in words is "six hundred sixty-four trillion, five hundred billion, fifty million, ten thousand, five hundred twenty-three".