165221132235512 has 8 divisors (see below), whose sum is σ = 309789622941600. Its totient is φ = 82610566117752.

The previous prime is 165221132235499. The next prime is 165221132235527. The reversal of 165221132235512 is 215532231122561.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 165221132235512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10326320764712 + ... + 10326320764727.

It is an arithmetic number, because the mean of its divisors is an integer number (38723702867700).

Almost surely, 2^{165221132235512} is an apocalyptic number.

It is an amenable number.

165221132235512 is a deficient number, since it is larger than the sum of its proper divisors (144568490706088).

165221132235512 is a wasteful number, since it uses less digits than its factorization.

165221132235512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652641529445 (or 20652641529441 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The spelling of 165221132235512 in words is "one hundred sixty-five trillion, two hundred twenty-one billion, one hundred thirty-two million, two hundred thirty-five thousand, five hundred twelve".