554889478821 has 24 divisors (see below), whose sum is σ = 748572814080.
Its totient is φ = 365609533824.
The previous prime is 554889478763. The next prime is 554889478831. The reversal of 554889478821 is 128874988455.
It is not a de Polignac number, because 554889478821 - 211 = 554889476773 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (554889478831) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12904285 + ... + 12947213.
It is an arithmetic number, because the mean of its divisors is an integer number (31190533920).
Almost surely, 2554889478821 is an apocalyptic number.
It is an amenable number.
554889478821 is a deficient number, since it is larger than the sum of its proper divisors (193683335259).
554889478821 is a wasteful number, since it uses less digits than its factorization.
554889478821 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 43433 (or 43294 counting only the distinct ones).
The product of its digits is 206438400, while the sum is 69.
The spelling of 554889478821 in words is "five hundred fifty-four billion, eight hundred eighty-nine million, four hundred seventy-eight thousand, eight hundred twenty-one".