1550345198191 has 2 divisors, whose sum is σ = 1550345198192. Its totient is φ = 1550345198190.

The previous prime is 1550345198189. The next prime is 1550345198219. The reversal of 1550345198191 is 1918915430551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1550345198191 - 2¹ = 1550345198189 is a prime.

Together with 1550345198189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550345198141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775172599095 + 775172599096.

It is an arithmetic number, because the mean of its divisors is an integer number (775172599096).

Almost surely, 2^{1550345198191} is an apocalyptic number.

1550345198191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550345198191 is an equidigital number, since it uses as much as digits as its factorization.

1550345198191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 52.

The spelling of 1550345198191 in words is "one trillion, five hundred fifty billion, three hundred forty-five million, one hundred ninety-eight thousand, one hundred ninety-one".