550728440640 has 336 divisors, whose sum is σ = 2166116015232. Its totient is φ = 125809348608.

The previous prime is 550728440567. The next prime is 550728440641. The reversal of 550728440640 is 46044827055.

550728440640 is a `hidden beast` number, since 5 + 507 + 2 + 84 + 4 + 0 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550728440641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40857582 + ... + 40871058.

Almost surely, 2^550728440640 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 550728440640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083058007616).

550728440640 is an abundant number, since it is smaller than the sum of its proper divisors (1615387574592).

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

550728440640 is a wasteful number, since it uses less digits than its factorization.

550728440640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15534 (or 15521 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 45.

The spelling of 550728440640 in words is "five hundred fifty billion, seven hundred twenty-eight million, four hundred forty thousand, six hundred forty".