551563760 has 80 divisors (see below), whose sum is σ = 1447273440. Its totient is φ = 193643520.

The previous prime is 551563757. The next prime is 551563763. The reversal of 551563760 is 67365155.

It is an interprime number because it is at equal distance from previous prime (551563757) and next prime (551563763).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551563763) 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 15 ways as a sum of consecutive naturals, for example, 14714 + ... + 36326.

It is an arithmetic number, because the mean of its divisors is an integer number (18090918).

Almost surely, 2^551563760 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 551563760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723636720).

551563760 is an abundant number, since it is smaller than the sum of its proper divisors (895709680).

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

551563760 is a wasteful number, since it uses less digits than its factorization.

551563760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21666 (or 21660 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 38.

The square root of 551563760 is about 23485.3946102679. The cubic root of 551563760 is about 820.0970339266.

The spelling of 551563760 in words is "five hundred fifty-one million, five hundred sixty-three thousand, seven hundred sixty".