5565155121 has 24 divisors (see below), whose sum is σ = 8142849000. Its totient is φ = 3662226432.

The previous prime is 5565155107. The next prime is 5565155143. The reversal of 5565155121 is 1215515655.

5565155121 is a `hidden beast` number, since 5 + 56 + 51 + 551 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1613146896 + 3952008225 = 40164^2 + 62865^2 .

It is not a de Polignac number, because 5565155121 - 2¹¹ = 5565153073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5565151121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253345 + ... + 274433.

It is an arithmetic number, because the mean of its divisors is an integer number (339285375).

Almost surely, 2^5565155121 is an apocalyptic number.

It is an amenable number.

5565155121 is a deficient number, since it is larger than the sum of its proper divisors (2577693879).

5565155121 is a wasteful number, since it uses less digits than its factorization.

5565155121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21473 (or 21470 counting only the distinct ones).

The product of its digits is 37500, while the sum is 36.

The square root of 5565155121 is about 74599.9672989204. The cubic root of 5565155121 is about 1772.1171343612.

The spelling of 5565155121 in words is "five billion, five hundred sixty-five million, one hundred fifty-five thousand, one hundred twenty-one".