664631409848 has 64 divisors (see below), whose sum is σ = 1430458315200. Its totient is φ = 283595120640.

The previous prime is 664631409839. The next prime is 664631409851. The reversal of 664631409848 is 848904136466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11905136 + ... + 11960832.

It is an arithmetic number, because the mean of its divisors is an integer number (22350911175).

Almost surely, 2^664631409848 is an apocalyptic number.

It is an amenable number.

664631409848 is an abundant number, since it is smaller than the sum of its proper divisors (765826905352).

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

664631409848 is a wasteful number, since it uses less digits than its factorization.

664631409848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56640 (or 56636 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 59.

The spelling of 664631409848 in words is "six hundred sixty-four billion, six hundred thirty-one million, four hundred nine thousand, eight hundred forty-eight".