165368192220 has 576 divisors, whose sum is σ = 650508558336. Its totient is φ = 34258878720.

The previous prime is 165368192207. The next prime is 165368192221. The reversal of 165368192220 is 22291863561.

165368192220 is a `hidden beast` number, since 1 + 6 + 536 + 8 + 1 + 92 + 2 + 20 = 666.

It is a super-2 number, since 2×165368192220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165368192221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 242119999 + ... + 242120681.

It is an arithmetic number, because the mean of its divisors is an integer number (1129355136).

Almost surely, 2^165368192220 is an apocalyptic number.

165368192220 is a gapful number since it is divisible by the number (10) 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 165368192220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325254279168).

165368192220 is an abundant number, since it is smaller than the sum of its proper divisors (485140366116).

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

165368192220 is a wasteful number, since it uses less digits than its factorization.

165368192220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 165368192220 in words is "one hundred sixty-five billion, three hundred sixty-eight million, one hundred ninety-two thousand, two hundred twenty".