551503680 has 448 divisors, whose sum is σ = 2212116480. Its totient is φ = 113319936.

The previous prime is 551503679. The next prime is 551503697. The reversal of 551503680 is 86305155.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 5154187 + ... + 5154293.

It is an arithmetic number, because the mean of its divisors is an integer number (4937760).

Almost surely, 2^551503680 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 551503680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106058240).

551503680 is an abundant number, since it is smaller than the sum of its proper divisors (1660612800).

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

551503680 is a wasteful number, since it uses less digits than its factorization.

551503680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 551503680 is about 23484.1154825980. The cubic root of 551503680 is about 820.0672560342.

The spelling of 551503680 in words is "five hundred fifty-one million, five hundred three thousand, six hundred eighty".