163655636664 has 128 divisors (see below), whose sum is σ = 460506312000. Its totient is φ = 48117694464.

The previous prime is 163655636633. The next prime is 163655636687. The reversal of 163655636664 is 466636556361.

It is a happy number.

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, 784422 + ... + 970890.

Almost surely, 2^163655636664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163655636664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230253156000).

163655636664 is an abundant number, since it is smaller than the sum of its proper divisors (296850675336).

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

163655636664 is a wasteful number, since it uses less digits than its factorization.

163655636664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186617 (or 186613 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 57.

The spelling of 163655636664 in words is "one hundred sixty-three billion, six hundred fifty-five million, six hundred thirty-six thousand, six hundred sixty-four".