1550345198189 has 2 divisors, whose sum is σ = 1550345198190. Its totient is φ = 1550345198188.

The previous prime is 1550345198183. The next prime is 1550345198191. The reversal of 1550345198189 is 9818915430551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110599822500 + 439745375689 = 1053850^2 + 663133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550345198189 - 2⁴ = 1550345198173 is a prime.

Together with 1550345198191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550345198183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775172599094 + 775172599095.

It is an arithmetic number, because the mean of its divisors is an integer number (775172599095).

Almost surely, 2^{1550345198189} is an apocalyptic number.

It is an amenable number.

1550345198189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550345198189 is an equidigital number, since it uses as much as digits as its factorization.

1550345198189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776000, while the sum is 59.

The spelling of 1550345198189 in words is "one trillion, five hundred fifty billion, three hundred forty-five million, one hundred ninety-eight thousand, one hundred eighty-nine".