550401243121016 has 128 divisors (see below), whose sum is σ = 1200962076672000. Its totient is φ = 231614817033600.

The previous prime is 550401243120991. The next prime is 550401243121019. The reversal of 550401243121016 is 610121342104055.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550401243121019) 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 31 ways as a sum of consecutive naturals, for example, 1193669951 + ... + 1194130961.

It is an arithmetic number, because the mean of its divisors is an integer number (9382516224000).

Almost surely, 2^{550401243121016} is an apocalyptic number.

550401243121016 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550401243121016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600481038336000).

550401243121016 is an abundant number, since it is smaller than the sum of its proper divisors (650560833550984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550401243121016 is a wasteful number, since it uses less digits than its factorization.

550401243121016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462593 (or 462589 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 550401243121016 in words is "five hundred fifty trillion, four hundred one billion, two hundred forty-three million, one hundred twenty-one thousand, sixteen".