551105856 has 140 divisors (see below), whose sum is σ = 1867151968. Its totient is φ = 157448448.

The previous prime is 551105839. The next prime is 551105869. The reversal of 551105856 is 658501155.

551105856 is a `hidden beast` number, since 551 + 1 + 0 + 58 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 551105856.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 28695 + ... + 43881.

Almost surely, 2^551105856 is an apocalyptic number.

551105856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551105856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933575984).

551105856 is an abundant number, since it is smaller than the sum of its proper divisors (1316046112).

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

551105856 is a wasteful number, since it uses less digits than its factorization.

551105856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15218 (or 15199 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

The square root of 551105856 is about 23475.6438889331. The cubic root of 551105856 is about 819.8700250070.

The spelling of 551105856 in words is "five hundred fifty-one million, one hundred five thousand, eight hundred fifty-six".