163786981932 has 144 divisors (see below), whose sum is σ = 494475018240. Its totient is φ = 46747562400.

The previous prime is 163786981913. The next prime is 163786981973. The reversal of 163786981932 is 239189687361.

163786981932 is a `hidden beast` number, since 16 + 378 + 69 + 8 + 193 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 163786981932.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5228757 + ... + 5259987.

Almost surely, 2^163786981932 is an apocalyptic number.

163786981932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163786981932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247237509120).

163786981932 is an abundant number, since it is smaller than the sum of its proper divisors (330688036308).

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

163786981932 is a wasteful number, since it uses less digits than its factorization.

163786981932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32249 (or 32234 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 163786981932 in words is "one hundred sixty-three billion, seven hundred eighty-six million, nine hundred eighty-one thousand, nine hundred thirty-two".