165864408188 has 6 divisors (see below), whose sum is σ = 290262714336. Its totient is φ = 82932204092.

The previous prime is 165864408133. The next prime is 165864408257. The reversal of 165864408188 is 881804468561.

It is a super-2 number, since 2×165864408188² (a number of 23 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 20733051020 + ... + 20733051027.

It is an arithmetic number, because the mean of its divisors is an integer number (48377119056).

Almost surely, 2^165864408188 is an apocalyptic number.

It is an amenable number.

165864408188 is a deficient number, since it is larger than the sum of its proper divisors (124398306148).

165864408188 is a wasteful number, since it uses less digits than its factorization.

165864408188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41466102051 (or 41466102049 counting only the distinct ones).

The product of its (nonzero) digits is 11796480, while the sum is 59.

The spelling of 165864408188 in words is "one hundred sixty-five billion, eight hundred sixty-four million, four hundred eight thousand, one hundred eighty-eight".