555634873884161 has 4 divisors (see below), whose sum is σ = 555635601321300. Its totient is φ = 555634146447024.

The previous prime is 555634873884157. The next prime is 555634873884163. The reversal of 555634873884161 is 161488378436555.

It is a happy number.

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 528985326101761 + 26649547782400 = 22999681^2 + 5162320^2 .

It is a cyclic number.

It is not a de Polignac number, because 555634873884161 - 2² = 555634873884157 is a prime.

It is a super-2 number, since 2×555634873884161² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555634873884163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362571626 + ... + 364100883.

It is an arithmetic number, because the mean of its divisors is an integer number (138908900330325).

Almost surely, 2^{555634873884161} is an apocalyptic number.

It is an amenable number.

555634873884161 is a deficient number, since it is larger than the sum of its proper divisors (727437139).

555634873884161 is an equidigital number, since it uses as much as digits as its factorization.

555634873884161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727437138.

The product of its digits is 2322432000, while the sum is 74.

The spelling of 555634873884161 in words is "five hundred fifty-five trillion, six hundred thirty-four billion, eight hundred seventy-three million, eight hundred eighty-four thousand, one hundred sixty-one".