663648255539136 has 224 divisors, whose sum is σ = 2246738434997760. Its totient is φ = 188166353356800.

The previous prime is 663648255539123. The next prime is 663648255539147. The reversal of 663648255539136 is 631935552846366.

663648255539136 is a `hidden beast` number, since 6 + 6 + 3 + 6 + 4 + 8 + 2 + 55 + 539 + 1 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207824205 + ... + 210993356.

Almost surely, 2^{663648255539136} is an apocalyptic number.

It is an amenable number.

663648255539136 is an abundant number, since it is smaller than the sum of its proper divisors (1583090179458624).

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

663648255539136 is a wasteful number, since it uses less digits than its factorization.

663648255539136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418817720 (or 418817704 counting only the distinct ones).

The product of its digits is 2519424000, while the sum is 72.

The spelling of 663648255539136 in words is "six hundred sixty-three trillion, six hundred forty-eight billion, two hundred fifty-five million, five hundred thirty-nine thousand, one hundred thirty-six".