556161556 has 12 divisors (see below), whose sum is σ = 997021620. Its totient is φ = 271298240.

The previous prime is 556161517. The next prime is 556161587. The reversal of 556161556 is 655161655.

It can be written as a sum of positive squares in 2 ways, for example, as 144720900 + 411440656 = 12030^2 + 20284^2 .

It is a super-2 number, since 2×556161556² = 618631352744682272, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1695451 + ... + 1695778.

It is an arithmetic number, because the mean of its divisors is an integer number (83085135).

Almost surely, 2^556161556 is an apocalyptic number.

It is an amenable number.

556161556 is a deficient number, since it is larger than the sum of its proper divisors (440860064).

556161556 is a wasteful number, since it uses less digits than its factorization.

556161556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391274 (or 3391272 counting only the distinct ones).

The product of its digits is 135000, while the sum is 40.

The square root of 556161556 is about 23583.0777465538. The cubic root of 556161556 is about 822.3694879499.

Subtracting 556161556 from its reverse (655161655), we obtain a palindrome (99000099).

The spelling of 556161556 in words is "five hundred fifty-six million, one hundred sixty-one thousand, five hundred fifty-six".