550355145520 has 80 divisors (see below), whose sum is σ = 1306517359680. Its totient is φ = 215554977792.

The previous prime is 550355145517. The next prime is 550355145601. The reversal of 550355145520 is 25541553055.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358132 + ... + 1108588.

It is an arithmetic number, because the mean of its divisors is an integer number (16331466996).

Almost surely, 2^550355145520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550355145520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653258679840).

550355145520 is an abundant number, since it is smaller than the sum of its proper divisors (756162214160).

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

550355145520 is a wasteful number, since it uses less digits than its factorization.

550355145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750662 (or 750656 counting only the distinct ones).

The product of its (nonzero) digits is 375000, while the sum is 40.

Adding to 550355145520 its reverse (25541553055), we get a palindrome (575896698575).

The spelling of 550355145520 in words is "five hundred fifty billion, three hundred fifty-five million, one hundred forty-five thousand, five hundred twenty".