5551889920 has 320 divisors, whose sum is σ = 15034662720. Its totient is φ = 1956118528.

The previous prime is 5551889887. The next prime is 5551889921. The reversal of 5551889920 is 299881555.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551889921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66890199 + ... + 66890281.

It is an arithmetic number, because the mean of its divisors is an integer number (46983321).

Almost surely, 2^5551889920 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 5551889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7517331360).

5551889920 is an abundant number, since it is smaller than the sum of its proper divisors (9482772800).

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

5551889920 is a wasteful number, since it uses less digits than its factorization.

5551889920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 52.

The square root of 5551889920 is about 74511.0053616243. The cubic root of 5551889920 is about 1770.7079976966.

The spelling of 5551889920 in words is "five billion, five hundred fifty-one million, eight hundred eighty-nine thousand, nine hundred twenty".