155616656165055 has 32 divisors (see below), whose sum is σ = 276658950193920. Its totient is φ = 82993414851360.

The previous prime is 155616656165051. The next prime is 155616656165059. The reversal of 155616656165055 is 550561656616551.

155616656165055 is a `hidden beast` number, since 1 + 5 + 5 + 6 + 1 + 6 + 6 + 5 + 616 + 5 + 0 + 5 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (155616656165051) and next prime (155616656165059).

It is not a de Polignac number, because 155616656165055 - 2² = 155616656165051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155616656164983 and 155616656165001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155616656165051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9553041 + ... + 20062250.

It is an arithmetic number, because the mean of its divisors is an integer number (8645592193560).

Almost surely, 2^{155616656165055} is an apocalyptic number.

155616656165055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155616656165055 is a deficient number, since it is larger than the sum of its proper divisors (121042294028865).

155616656165055 is a wasteful number, since it uses less digits than its factorization.

155616656165055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29654228 (or 29654222 counting only the distinct ones).

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

The spelling of 155616656165055 in words is "one hundred fifty-five trillion, six hundred sixteen billion, six hundred fifty-six million, one hundred sixty-five thousand, fifty-five".