556645307 has 2 divisors, whose sum is σ = 556645308. Its totient is φ = 556645306.

The previous prime is 556645301. The next prime is 556645373. The reversal of 556645307 is 703546655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556645307 - 2⁴ = 556645291 is a prime.

It is not a weakly prime, because it can be changed into another prime (556645301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278322653 + 278322654.

It is an arithmetic number, because the mean of its divisors is an integer number (278322654).

Almost surely, 2^556645307 is an apocalyptic number.

556645307 is a deficient number, since it is larger than the sum of its proper divisors (1).

556645307 is an equidigital number, since it uses as much as digits as its factorization.

556645307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 41.

The square root of 556645307 is about 23593.3318333804. The cubic root of 556645307 is about 822.6078520076.

The spelling of 556645307 in words is "five hundred fifty-six million, six hundred forty-five thousand, three hundred seven".