6551505550 has 48 divisors (see below), whose sum is σ = 12460631040. Its totient is φ = 2562150240.

The previous prime is 6551505547. The next prime is 6551505551. The reversal of 6551505550 is 555051556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551505551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398799 + ... + 414901.

It is an arithmetic number, because the mean of its divisors is an integer number (259596480).

Almost surely, 2^6551505550 is an apocalyptic number.

6551505550 is a deficient number, since it is larger than the sum of its proper divisors (5909125490).

6551505550 is a wasteful number, since it uses less digits than its factorization.

6551505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16297 (or 16292 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 37.

The square root of 6551505550 is about 80941.3710657288. The cubic root of 6551505550 is about 1871.1719754551.

The spelling of 6551505550 in words is "six billion, five hundred fifty-one million, five hundred five thousand, five hundred fifty".