165155511165156 has 36 divisors (see below), whose sum is σ = 417481618008000. Its totient is φ = 55051153054128.

The previous prime is 165155511165119. The next prime is 165155511165157. The reversal of 165155511165156 is 651561115551561.

165155511165156 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 5 + 5 + 5 + 1 + 116 + 515 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (165155511165157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25558176 + ... + 31361303.

Almost surely, 2^{165155511165156} is an apocalyptic number.

It is an amenable number.

165155511165156 is an abundant number, since it is smaller than the sum of its proper divisors (252326106842844).

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

165155511165156 is a wasteful number, since it uses less digits than its factorization.

165155511165156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57000088 (or 57000083 counting only the distinct ones).

The product of its digits is 3375000, while the sum is 54.

The spelling of 165155511165156 in words is "one hundred sixty-five trillion, one hundred fifty-five billion, five hundred eleven million, one hundred sixty-five thousand, one hundred fifty-six".