55455069121 has 3 divisors (see below), whose sum is σ = 55455304611. Its totient is φ = 55454833632.

The previous prime is 55455069083. The next prime is 55455069139. The reversal of 55455069121 is 12196055455.

It is a happy number.

The square root of 55455069121 is 235489.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2094069121 + 53361000000 = 45761^2 + 231000^2 .

It is not a de Polignac number, because 55455069121 - 2⁷ = 55455068993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55455069721) 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 2 ways as a sum of consecutive naturals, for example, 117745 + ... + 353233.

It is an arithmetic number, because the mean of its divisors is an integer number (18485101537).

Almost surely, 2^55455069121 is an apocalyptic number.

55455069121 is the 235489-th square number.

55455069121 is the 117745-th centered octagonal number.

It is an amenable number.

55455069121 is a deficient number, since it is larger than the sum of its proper divisors (235490).

55455069121 is an frugal number, since it uses more digits than its factorization.

55455069121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470978 (or 235489 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 55455069121 in words is "fifty-five billion, four hundred fifty-five million, sixty-nine thousand, one hundred twenty-one".