550555540 has 24 divisors (see below), whose sum is σ = 1224177192. Its totient is φ = 207267840.

The previous prime is 550555519. The next prime is 550555543. The reversal of 550555540 is 45555055.

It can be written as a sum of positive squares in 4 ways, for example, as 156850576 + 393704964 = 12524^2 + 19842^2 .

It is a super-2 number, since 2×550555540² = 606222805249383200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 550555496 and 550555505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550555543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809301 + ... + 809980.

It is an arithmetic number, because the mean of its divisors is an integer number (51007383).

Almost surely, 2^550555540 is an apocalyptic number.

It is an amenable number.

550555540 is an abundant number, since it is smaller than the sum of its proper divisors (673621652).

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

550555540 is a wasteful number, since it uses less digits than its factorization.

550555540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619307 (or 1619305 counting only the distinct ones).

The product of its (nonzero) digits is 62500, while the sum is 34.

The square root of 550555540 is about 23463.9199623592. The cubic root of 550555540 is about 819.5970357973.

The spelling of 550555540 in words is "five hundred fifty million, five hundred fifty-five thousand, five hundred forty".