155050515161 has 4 divisors (see below), whose sum is σ = 155052285924. Its totient is φ = 155048744400.

The previous prime is 155050515097. The next prime is 155050515173. The reversal of 155050515161 is 161515050551.

155050515161 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: 161515050551 = 31 ⋅5210162921.

It can be written as a sum of positive squares in 2 ways, for example, as 117042673225 + 38007841936 = 342115^2 + 194956^2 .

It is a cyclic number.

It is not a de Polignac number, because 155050515161 - 2⁶ = 155050515097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155050517161) 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, 746810 + ... + 931571.

It is an arithmetic number, because the mean of its divisors is an integer number (38763071481).

Almost surely, 2^155050515161 is an apocalyptic number.

It is an amenable number.

155050515161 is a deficient number, since it is larger than the sum of its proper divisors (1770763).

155050515161 is an equidigital number, since it uses as much as digits as its factorization.

155050515161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770762.

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 155050515161 in words is "one hundred fifty-five billion, fifty million, five hundred fifteen thousand, one hundred sixty-one".