556390777 has 2 divisors, whose sum is σ = 556390778. Its totient is φ = 556390776.

The previous prime is 556390687. The next prime is 556390817. The reversal of 556390777 is 777093655.

556390777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 517153081 + 39237696 = 22741^2 + 6264^2 .

It is a cyclic number.

It is not a de Polignac number, because 556390777 - 2¹⁵ = 556358009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556390777.

It is not a weakly prime, because it can be changed into another prime (556394777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278195388 + 278195389.

It is an arithmetic number, because the mean of its divisors is an integer number (278195389).

Almost surely, 2^556390777 is an apocalyptic number.

It is an amenable number.

556390777 is a deficient number, since it is larger than the sum of its proper divisors (1).

556390777 is an equidigital number, since it uses as much as digits as its factorization.

556390777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1389150, while the sum is 49.

The square root of 556390777 is about 23587.9371077676. The cubic root of 556390777 is about 822.4824518079.

The spelling of 556390777 in words is "five hundred fifty-six million, three hundred ninety thousand, seven hundred seventy-seven".