163540984128 has 56 divisors (see below), whose sum is σ = 434608480032. Its totient is φ = 54273498624.

The previous prime is 163540984037. The next prime is 163540984151. The reversal of 163540984128 is 821489045361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1832575 + ... + 1919742.

Almost surely, 2^163540984128 is an apocalyptic number.

It is an amenable number.

163540984128 is an abundant number, since it is smaller than the sum of its proper divisors (271067495904).

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

163540984128 is a wasteful number, since it uses less digits than its factorization.

163540984128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752559 (or 3752549 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 163540984128 in words is "one hundred sixty-three billion, five hundred forty million, nine hundred eighty-four thousand, one hundred twenty-eight".