556505499989 has 2 divisors, whose sum is σ = 556505499990. Its totient is φ = 556505499988.

The previous prime is 556505499971. The next prime is 556505500051. The reversal of 556505499989 is 989994505655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 470637160900 + 85868339089 = 686030^2 + 293033^2 .

It is a cyclic number.

It is not a de Polignac number, because 556505499989 - 2²⁴ = 556488722773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556505499959) 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 as a sum of consecutive naturals, namely, 278252749994 + 278252749995.

It is an arithmetic number, because the mean of its divisors is an integer number (278252749995).

Almost surely, 2^556505499989 is an apocalyptic number.

It is an amenable number.

556505499989 is a deficient number, since it is larger than the sum of its proper divisors (1).

556505499989 is an equidigital number, since it uses as much as digits as its factorization.

556505499989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320000, while the sum is 74.

The spelling of 556505499989 in words is "five hundred fifty-six billion, five hundred five million, four hundred ninety-nine thousand, nine hundred eighty-nine".