165658513055 has 32 divisors (see below), whose sum is σ = 240587449344. Its totient is φ = 106897015296.

The previous prime is 165658512991. The next prime is 165658513057. The reversal of 165658513055 is 550315856561.

It is a cyclic number.

It is not a de Polignac number, because 165658513055 - 2⁶ = 165658512991 is a prime.

It is a super-3 number, since 3×165658513055³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165658512994 and 165658513012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165658513057) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5317454 + ... + 5348516.

It is an arithmetic number, because the mean of its divisors is an integer number (7518357792).

Almost surely, 2^165658513055 is an apocalyptic number.

165658513055 is a deficient number, since it is larger than the sum of its proper divisors (74928936289).

165658513055 is a wasteful number, since it uses less digits than its factorization.

165658513055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40055.

The product of its (nonzero) digits is 2700000, while the sum is 50.

The spelling of 165658513055 in words is "one hundred sixty-five billion, six hundred fifty-eight million, five hundred thirteen thousand, fifty-five".