163556894972 has 6 divisors (see below), whose sum is σ = 286224566208. Its totient is φ = 81778447484.

The previous prime is 163556894933. The next prime is 163556894987. The reversal of 163556894972 is 279498655361.

It is a junction number, because it is equal to n+sod(n) for n = 163556894899 and 163556894908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20444611868 + ... + 20444611875.

It is an arithmetic number, because the mean of its divisors is an integer number (47704094368).

Almost surely, 2^163556894972 is an apocalyptic number.

It is an amenable number.

163556894972 is a deficient number, since it is larger than the sum of its proper divisors (122667671236).

163556894972 is a wasteful number, since it uses less digits than its factorization.

163556894972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40889223747 (or 40889223745 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 65.

The spelling of 163556894972 in words is "one hundred sixty-three billion, five hundred fifty-six million, eight hundred ninety-four thousand, nine hundred seventy-two".