163642134056 has 8 divisors (see below), whose sum is σ = 306829001370. Its totient is φ = 81821067024.

The previous prime is 163642134053. The next prime is 163642134077. The reversal of 163642134056 is 650431246361.

It can be written as a sum of positive squares in only one way, i.e., 162336468100 + 1305665956 = 402910^2 + 36134^2 .

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

It is a super-2 number, since 2×163642134056² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163642134053) 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, 10227633371 + ... + 10227633386.

Almost surely, 2^163642134056 is an apocalyptic number.

It is an amenable number.

163642134056 is a deficient number, since it is larger than the sum of its proper divisors (143186867314).

163642134056 is a wasteful number, since it uses less digits than its factorization.

163642134056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20455266763 (or 20455266759 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 163642134056 in words is "one hundred sixty-three billion, six hundred forty-two million, one hundred thirty-four thousand, fifty-six".