155613615655 has 4 divisors (see below), whose sum is σ = 186736338792. Its totient is φ = 124490892520.

The previous prime is 155613615623. The next prime is 155613615667. The reversal of 155613615655 is 556516316551.

155613615655 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: 556516316551 = 13 ⋅42808947427.

It is not a de Polignac number, because 155613615655 - 2⁵ = 155613615623 is a prime.

It is a super-2 number, since 2×155613615655² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155613615599 and 155613615608.

It is a congruent number.

It is an unprimeable number.

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, 15561361561 + ... + 15561361570.

It is an arithmetic number, because the mean of its divisors is an integer number (46684084698).

Almost surely, 2^155613615655 is an apocalyptic number.

155613615655 is a deficient number, since it is larger than the sum of its proper divisors (31122723137).

155613615655 is an equidigital number, since it uses as much as digits as its factorization.

155613615655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31122723136.

The product of its digits is 2025000, while the sum is 49.

The spelling of 155613615655 in words is "one hundred fifty-five billion, six hundred thirteen million, six hundred fifteen thousand, six hundred fifty-five".