616556 has 12 divisors (see below), whose sum is σ = 1142568. Its totient is φ = 290112.

The previous prime is 616547. The next prime is 616579. The reversal of 616556 is 655616.

It is a super-2 number, since 2×616556² = 760282602272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4466 + ... + 4601.

It is an arithmetic number, because the mean of its divisors is an integer number (95214).

2⁶¹⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

616556 is a deficient number, since it is larger than the sum of its proper divisors (526012).

616556 is a wasteful number, since it uses less digits than its factorization.

616556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088 (or 9086 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 616556 is about 785.2107997220. The cubic root of 616556 is about 85.1120091972.

Subtracting 616556 from its reverse (655616), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 616556 in words is "six hundred sixteen thousand, five hundred fifty-six".