1918506050089 has 2 divisors, whose sum is σ = 1918506050090. Its totient is φ = 1918506050088.

The previous prime is 1918506050059. The next prime is 1918506050099. The reversal of 1918506050089 is 9800506058191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1534645260864 + 383860789225 = 1238808^2 + 619565^2 .

It is an emirp because it is prime and its reverse (9800506058191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1918506050089 - 2⁵ = 1918506050057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1918506050059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959253025044 + 959253025045.

It is an arithmetic number, because the mean of its divisors is an integer number (959253025045).

Almost surely, 2^{1918506050089} is an apocalyptic number.

It is an amenable number.

1918506050089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918506050089 is an equidigital number, since it uses as much as digits as its factorization.

1918506050089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 52.

The spelling of 1918506050089 in words is "one trillion, nine hundred eighteen billion, five hundred six million, fifty thousand, eighty-nine".