165397193208 has 384 divisors, whose sum is σ = 519910809600. Its totient is φ = 47076277248.

The previous prime is 165397193183. The next prime is 165397193231. The reversal of 165397193208 is 802391793561.

165397193208 is a `hidden beast` number, since 1 + 6 + 539 + 71 + 9 + 32 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 151323510 + ... + 151324602.

It is an arithmetic number, because the mean of its divisors is an integer number (1353934400).

Almost surely, 2^165397193208 is an apocalyptic number.

165397193208 is a gapful number since it is divisible by the number (18) 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 165397193208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259955404800).

165397193208 is an abundant number, since it is smaller than the sum of its proper divisors (354513616392).

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

165397193208 is a wasteful number, since it uses less digits than its factorization.

165397193208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331 (or 1324 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 165397193208 in words is "one hundred sixty-five billion, three hundred ninety-seven million, one hundred ninety-three thousand, two hundred eight".