5505655121 has 2 divisors, whose sum is σ = 5505655122. Its totient is φ = 5505655120.

The previous prime is 5505655091. The next prime is 5505655157. The reversal of 5505655121 is 1215565055.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5411662096 + 93993025 = 73564^2 + 9695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5505655121 is a prime.

It is a super-2 number, since 2×5505655121² = 60624476622787049282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5505655171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752827560 + 2752827561.

It is an arithmetic number, because the mean of its divisors is an integer number (2752827561).

Almost surely, 2^5505655121 is an apocalyptic number.

It is an amenable number.

5505655121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505655121 is an equidigital number, since it uses as much as digits as its factorization.

5505655121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37500, while the sum is 35.

The square root of 5505655121 is about 74200.1018934610. The cubic root of 5505655121 is about 1765.7789467046.

The spelling of 5505655121 in words is "five billion, five hundred five million, six hundred fifty-five thousand, one hundred twenty-one".