155555504411009 has 2 divisors, whose sum is σ = 155555504411010. Its totient is φ = 155555504411008.

The previous prime is 155555504410987. The next prime is 155555504411089. The reversal of 155555504411009 is 900114405555551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80829593718784 + 74725910692225 = 8990528^2 + 8644415^2 .

It is a cyclic number.

It is not a de Polignac number, because 155555504411009 - 2⁸ = 155555504410753 is a prime.

It is not a weakly prime, because it can be changed into another prime (155555504411089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77777752205504 + 77777752205505.

It is an arithmetic number, because the mean of its divisors is an integer number (77777752205505).

Almost surely, 2^{155555504411009} is an apocalyptic number.

It is an amenable number.

155555504411009 is a deficient number, since it is larger than the sum of its proper divisors (1).

155555504411009 is an equidigital number, since it uses as much as digits as its factorization.

155555504411009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250000, while the sum is 50.

The spelling of 155555504411009 in words is "one hundred fifty-five trillion, five hundred fifty-five billion, five hundred four million, four hundred eleven thousand, nine".