556100009 has 4 divisors (see below), whose sum is σ = 566592516. Its totient is φ = 545607504.

The previous prime is 556099981. The next prime is 556100063. The reversal of 556100009 is 900001655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 429649984 + 126450025 = 20728^2 + 11245^2 .

It is a cyclic number.

It is not a de Polignac number, because 556100009 - 2¹⁶ = 556034473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556100089) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5246174 + ... + 5246279.

It is an arithmetic number, because the mean of its divisors is an integer number (141648129).

Almost surely, 2^556100009 is an apocalyptic number.

It is an amenable number.

556100009 is a deficient number, since it is larger than the sum of its proper divisors (10492507).

556100009 is a wasteful number, since it uses less digits than its factorization.

556100009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10492506.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 556100009 is about 23581.7728129163. The cubic root of 556100009 is about 822.3391512960.

The spelling of 556100009 in words is "five hundred fifty-six million, one hundred thousand, nine".