551368890 has 32 divisors (see below), whose sum is σ = 1470317760. Its totient is φ = 147031632.

The previous prime is 551368879. The next prime is 551368963. The reversal of 551368890 is 98863155.

551368890 is a `hidden beast` number, since 551 + 3 + 6 + 8 + 8 + 90 = 666.

551368890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020784 + ... + 1021323.

It is an arithmetic number, because the mean of its divisors is an integer number (45947430).

Almost surely, 2^551368890 is an apocalyptic number.

551368890 is an abundant number, since it is smaller than the sum of its proper divisors (918948870).

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

551368890 is a wasteful number, since it uses less digits than its factorization.

551368890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042123 (or 2042117 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 551368890 is about 23481.2454950754. The cubic root of 551368890 is about 820.0004412054. Note that the first 3 decimals are identical.

The spelling of 551368890 in words is "five hundred fifty-one million, three hundred sixty-eight thousand, eight hundred ninety".