155516265545 has 4 divisors (see below), whose sum is σ = 186619518660. Its totient is φ = 124413012432.

The previous prime is 155516265521. The next prime is 155516265559. The reversal of 155516265545 is 545562615551.

155516265545 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.

It can be written as a sum of positive squares in 2 ways, for example, as 121363747129 + 34152518416 = 348373^2 + 184804^2 .

It is a cyclic number.

It is not a de Polignac number, because 155516265545 - 2¹⁰ = 155516264521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155516265493 and 155516265502.

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, 15551626550 + ... + 15551626559.

It is an arithmetic number, because the mean of its divisors is an integer number (46654879665).

Almost surely, 2^155516265545 is an apocalyptic number.

It is an amenable number.

155516265545 is a deficient number, since it is larger than the sum of its proper divisors (31103253115).

155516265545 is an equidigital number, since it uses as much as digits as its factorization.

155516265545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31103253114.

The product of its digits is 4500000, while the sum is 50.

The spelling of 155516265545 in words is "one hundred fifty-five billion, five hundred sixteen million, two hundred sixty-five thousand, five hundred forty-five".