165981298392 has 960 divisors, whose sum is σ = 617682542400. Its totient is φ = 40497408000.

The previous prime is 165981298349. The next prime is 165981298453. The reversal of 165981298392 is 293892189561.

165981298392 is a `hidden beast` number, since 1 + 6 + 598 + 1 + 2 + 9 + 8 + 39 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1643379142 + ... + 1643379242.

It is an arithmetic number, because the mean of its divisors is an integer number (643419315).

Almost surely, 2^165981298392 is an apocalyptic number.

165981298392 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 165981298392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308841271200).

165981298392 is an abundant number, since it is smaller than the sum of its proper divisors (451701244008).

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

165981298392 is a wasteful number, since it uses less digits than its factorization.

165981298392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 186 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 165981298392 in words is "one hundred sixty-five billion, nine hundred eighty-one million, two hundred ninety-eight thousand, three hundred ninety-two".