165156205221052 has 48 divisors (see below), whose sum is σ = 309727035811872. Its totient is φ = 76780392099840.

The previous prime is 165156205221019. The next prime is 165156205221061. The reversal of 165156205221052 is 250122502651561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115516402 + ... + 116937382.

It is an arithmetic number, because the mean of its divisors is an integer number (6452646579414).

Almost surely, 2^{165156205221052} is an apocalyptic number.

It is an amenable number.

165156205221052 is a deficient number, since it is larger than the sum of its proper divisors (144570830590820).

165156205221052 is a wasteful number, since it uses less digits than its factorization.

165156205221052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441678 (or 1441676 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 43.

The spelling of 165156205221052 in words is "one hundred sixty-five trillion, one hundred fifty-six billion, two hundred five million, two hundred twenty-one thousand, fifty-two".