155055666559 has 4 divisors (see below), whose sum is σ = 156478195720. Its totient is φ = 153633137400.

The previous prime is 155055666547. The next prime is 155055666587. The reversal of 155055666559 is 955666550551.

155055666559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955666550551 = 121061 ⋅7894091.

It is a cyclic number.

It is not a de Polignac number, because 155055666559 - 2²⁹ = 154518795647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155055661559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711264417 + ... + 711264634.

It is an arithmetic number, because the mean of its divisors is an integer number (39119548930).

Almost surely, 2^155055666559 is an apocalyptic number.

155055666559 is a deficient number, since it is larger than the sum of its proper divisors (1422529161).

155055666559 is a wasteful number, since it uses less digits than its factorization.

155055666559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422529160.

The product of its (nonzero) digits is 30375000, while the sum is 58.

The spelling of 155055666559 in words is "one hundred fifty-five billion, fifty-five million, six hundred sixty-six thousand, five hundred fifty-nine".