550542564 has 144 divisors (see below), whose sum is σ = 1645600320. Its totient is φ = 152997120.

The previous prime is 550542557. The next prime is 550542581. The reversal of 550542564 is 465245055.

550542564 is a `hidden beast` number, since 5 + 50 + 5 + 42 + 564 = 666.

It is a super-2 number, since 2×550542564² = 606194229551388192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1178659 + ... + 1179125.

It is an arithmetic number, because the mean of its divisors is an integer number (11427780).

Almost surely, 2^550542564 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 550542564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (822800160).

550542564 is an abundant number, since it is smaller than the sum of its proper divisors (1095057756).

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

550542564 is a wasteful number, since it uses less digits than its factorization.

550542564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The square root of 550542564 is about 23463.6434510926. The cubic root of 550542564 is about 819.5905967408.

The spelling of 550542564 in words is "five hundred fifty million, five hundred forty-two thousand, five hundred sixty-four".