168925781232 has 280 divisors, whose sum is σ = 551451517344. Its totient is φ = 49716260352.

The previous prime is 168925781183. The next prime is 168925781279. The reversal of 168925781232 is 232187529861.

168925781232 is a `hidden beast` number, since 1 + 6 + 89 + 257 + 81 + 232 = 666.

168925781232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3463318 + ... + 3511754.

Almost surely, 2^168925781232 is an apocalyptic number.

168925781232 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 168925781232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275725758672).

168925781232 is an abundant number, since it is smaller than the sum of its proper divisors (382525736112).

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

168925781232 is a wasteful number, since it uses less digits than its factorization.

168925781232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48499 (or 48478 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 168925781232 in words is "one hundred sixty-eight billion, nine hundred twenty-five million, seven hundred eighty-one thousand, two hundred thirty-two".