55279180390009 has 3 divisors (see below), whose sum is σ = 55279187825007. Its totient is φ = 55279172955012.

The previous prime is 55279180389997. The next prime is 55279180390067. The reversal of 55279180390009 is 90009308197255.

The square root of 55279180390009 is 7434997.

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., 8826395355625 + 46452785034384 = 2970925^2 + 6815628^2 .

It is not a de Polignac number, because 55279180390009 - 2¹⁵ = 55279180357241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55279180390309) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3717499 + ... + 11152495.

It is an arithmetic number, because the mean of its divisors is an integer number (18426395941669).

Almost surely, 2^{55279180390009} is an apocalyptic number.

55279180390009 is the 7434997-th square number.

55279180390009 is the 3717499-th centered octagonal number.

It is an amenable number.

55279180390009 is a deficient number, since it is larger than the sum of its proper divisors (7434998).

55279180390009 is an frugal number, since it uses more digits than its factorization.

55279180390009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14869994 (or 7434997 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 58.

The spelling of 55279180390009 in words is "fifty-five trillion, two hundred seventy-nine billion, one hundred eighty million, three hundred ninety thousand, nine".