165191589852 has 24 divisors (see below), whose sum is σ = 386090544000. Its totient is φ = 54971934576.

The previous prime is 165191589769. The next prime is 165191589869. The reversal of 165191589852 is 258985191561.

It is a super-2 number, since 2×165191589852² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11483602 + ... + 11497977.

It is an arithmetic number, because the mean of its divisors is an integer number (16087106000).

Almost surely, 2^165191589852 is an apocalyptic number.

165191589852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165191589852 is an abundant number, since it is smaller than the sum of its proper divisors (220898954148).

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

165191589852 is a wasteful number, since it uses less digits than its factorization.

165191589852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22982185 (or 22982183 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 60.

The spelling of 165191589852 in words is "one hundred sixty-five billion, one hundred ninety-one million, five hundred eighty-nine thousand, eight hundred fifty-two".