664241553636 has 24 divisors (see below), whose sum is σ = 1552860447264. Its totient is φ = 220990495680.

The previous prime is 664241553631. The next prime is 664241553643. The reversal of 664241553636 is 636355142466.

It is not an unprimeable number, because it can be changed into a prime (664241553631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 52912905 + ... + 52925456.

It is an arithmetic number, because the mean of its divisors is an integer number (64702518636).

Almost surely, 2^664241553636 is an apocalyptic number.

It is an amenable number.

664241553636 is an abundant number, since it is smaller than the sum of its proper divisors (888618893628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664241553636 is a wasteful number, since it uses less digits than its factorization.

664241553636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105838891 (or 105838889 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 51.

The spelling of 664241553636 in words is "six hundred sixty-four billion, two hundred forty-one million, five hundred fifty-three thousand, six hundred thirty-six".