165571219422 has 192 divisors, whose sum is σ = 431806464000. Its totient is φ = 46888269120.

The previous prime is 165571219399. The next prime is 165571219453. The reversal of 165571219422 is 224912175561.

165571219422 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 7 + 1 + 219 + 422 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 201669772 + ... + 201670592.

It is an arithmetic number, because the mean of its divisors is an integer number (2248992000).

Almost surely, 2^165571219422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165571219422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215903232000).

165571219422 is an abundant number, since it is smaller than the sum of its proper divisors (266235244578).

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

165571219422 is a wasteful number, since it uses less digits than its factorization.

165571219422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428 (or 1415 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 165571219422 in words is "one hundred sixty-five billion, five hundred seventy-one million, two hundred nineteen thousand, four hundred twenty-two".