550561867 has 2 divisors, whose sum is σ = 550561868. Its totient is φ = 550561866.

The previous prime is 550561861. The next prime is 550561871. The reversal of 550561867 is 768165055.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550561867 is a prime.

It is not a weakly prime, because it can be changed into another prime (550561861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275280933 + 275280934.

It is an arithmetic number, because the mean of its divisors is an integer number (275280934).

Almost surely, 2^550561867 is an apocalyptic number.

550561867 is a deficient number, since it is larger than the sum of its proper divisors (1).

550561867 is an equidigital number, since it uses as much as digits as its factorization.

550561867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 550561867 is about 23464.0547859913. The cubic root of 550561867 is about 819.6001753961.

The spelling of 550561867 in words is "five hundred fifty million, five hundred sixty-one thousand, eight hundred sixty-seven".