551856788 has 48 divisors (see below), whose sum is σ = 1171344384. Its totient is φ = 222082560.

The previous prime is 551856787. The next prime is 551856817. The reversal of 551856788 is 887658155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551856787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256445 + ... + 258587.

It is an arithmetic number, because the mean of its divisors is an integer number (24403008).

Almost surely, 2^551856788 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 551856788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585672192).

551856788 is an abundant number, since it is smaller than the sum of its proper divisors (619487596).

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

551856788 is a wasteful number, since it uses less digits than its factorization.

551856788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2710 counting only the distinct ones).

The product of its digits is 2688000, while the sum is 53.

The square root of 551856788 is about 23491.6322974799. The cubic root of 551856788 is about 820.2422385654.

The spelling of 551856788 in words is "five hundred fifty-one million, eight hundred fifty-six thousand, seven hundred eighty-eight".