556551605 has 16 divisors (see below), whose sum is σ = 679580928. Its totient is φ = 437558800.

The previous prime is 556551533. The next prime is 556551641. The reversal of 556551605 is 506155655.

It is not a de Polignac number, because 556551605 - 2²⁰ = 555503029 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1789400 + ... + 1789710.

It is an arithmetic number, because the mean of its divisors is an integer number (42473808).

Almost surely, 2^556551605 is an apocalyptic number.

It is an amenable number.

556551605 is a deficient number, since it is larger than the sum of its proper divisors (123029323).

556551605 is an frugal number, since it uses more digits than its factorization.

556551605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 556551605 is about 23591.3459768619. The cubic root of 556551605 is about 822.5616919571.

The spelling of 556551605 in words is "five hundred fifty-six million, five hundred fifty-one thousand, six hundred five".