165616156655055 has 32 divisors (see below), whose sum is σ = 299983981878720. Its totient is φ = 86662039201920.

The previous prime is 165616156655029. The next prime is 165616156655063. The reversal of 165616156655055 is 550556651616561.

165616156655055 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 1 + 6 + 15 + 66 + 550 + 5 + 5 = 666.

It is not a de Polignac number, because 165616156655055 - 2²² = 165616152460751 is a prime.

It is a super-2 number, since 2×165616156655055² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165616156654983 and 165616156655001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11573448936 + ... + 11573463245.

It is an arithmetic number, because the mean of its divisors is an integer number (9374499433710).

Almost surely, 2^{165616156655055} is an apocalyptic number.

165616156655055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165616156655055 is a deficient number, since it is larger than the sum of its proper divisors (134367825223665).

165616156655055 is a wasteful number, since it uses less digits than its factorization.

165616156655055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23146912248 (or 23146912242 counting only the distinct ones).

The product of its (nonzero) digits is 121500000, while the sum is 63.

The spelling of 165616156655055 in words is "one hundred sixty-five trillion, six hundred sixteen billion, one hundred fifty-six million, six hundred fifty-five thousand, fifty-five".