163655666632 has 8 divisors (see below), whose sum is σ = 306854374950. Its totient is φ = 81827833312.

The previous prime is 163655666609. The next prime is 163655666639. The reversal of 163655666632 is 236666556361.

It can be written as a sum of positive squares in only one way, i.e., 119457331876 + 44198334756 = 345626^2 + 210234^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (163655666639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228479157 + ... + 10228479172.

Almost surely, 2^163655666632 is an apocalyptic number.

It is an amenable number.

163655666632 is a deficient number, since it is larger than the sum of its proper divisors (143198708318).

163655666632 is a wasteful number, since it uses less digits than its factorization.

163655666632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20456958335 (or 20456958331 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 55.

The spelling of 163655666632 in words is "one hundred sixty-three billion, six hundred fifty-five million, six hundred sixty-six thousand, six hundred thirty-two".