5551787520 has 320 divisors, whose sum is σ = 20364410880. Its totient is φ = 1432166400.

The previous prime is 5551787513. The next prime is 5551787537. The reversal of 5551787520 is 257871555.

5551787520 is a `hidden beast` number, since 5 + 5 + 51 + 78 + 7 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 31 ways as a sum of consecutive naturals, for example, 2141425 + ... + 2144015.

It is an arithmetic number, because the mean of its divisors is an integer number (63638784).

Almost surely, 2^5551787520 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 5551787520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10182205440).

5551787520 is an abundant number, since it is smaller than the sum of its proper divisors (14812623360).

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

5551787520 is a wasteful number, since it uses less digits than its factorization.

5551787520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654 (or 2632 counting only the distinct ones).

The product of its (nonzero) digits is 490000, while the sum is 45.

The square root of 5551787520 is about 74510.3182116410. The cubic root of 5551787520 is about 1770.6971112167.

The spelling of 5551787520 in words is "five billion, five hundred fifty-one million, seven hundred eighty-seven thousand, five hundred twenty".