556541506 has 4 divisors (see below), whose sum is σ = 834812262. Its totient is φ = 278270752.

The previous prime is 556541501. The next prime is 556541537. The reversal of 556541506 is 605145655.

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

It can be written as a sum of positive squares in only one way, i.e., 403648281 + 152893225 = 20091^2 + 12365^2 .

It is not an unprimeable number, because it can be changed into a prime (556541501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139135375 + ... + 139135378.

Almost surely, 2^556541506 is an apocalyptic number.

556541506 is a deficient number, since it is larger than the sum of its proper divisors (278270756).

556541506 is a wasteful number, since it uses less digits than its factorization.

556541506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278270755.

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 556541506 is about 23591.1319355388. The cubic root of 556541506 is about 822.5567166169.

The spelling of 556541506 in words is "five hundred fifty-six million, five hundred forty-one thousand, five hundred six".