551805664 has 12 divisors (see below), whose sum is σ = 1086367464. Its totient is φ = 275902816.

The previous prime is 551805659. The next prime is 551805671. The reversal of 551805664 is 466508155.

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 as a sum of consecutive naturals, namely, 8621932 + ... + 8621995.

It is an arithmetic number, because the mean of its divisors is an integer number (90530622).

Almost surely, 2^551805664 is an apocalyptic number.

It is an amenable number.

551805664 is a deficient number, since it is larger than the sum of its proper divisors (534561800).

551805664 is a wasteful number, since it uses less digits than its factorization.

551805664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17243937 (or 17243929 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 551805664 is about 23490.5441401429. The cubic root of 551805664 is about 820.2169087093.

The spelling of 551805664 in words is "five hundred fifty-one million, eight hundred five thousand, six hundred sixty-four".