1773898145197 has 2 divisors, whose sum is σ = 1773898145198. Its totient is φ = 1773898145196.

The previous prime is 1773898145161. The next prime is 1773898145213. The reversal of 1773898145197 is 7915418983771.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1269022527081 + 504875618116 = 1126509^2 + 710546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1773898145197 - 2¹⁵ = 1773898112429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1773898545197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 886949072598 + 886949072599.

It is an arithmetic number, because the mean of its divisors is an integer number (886949072599).

Almost surely, 2^{1773898145197} is an apocalyptic number.

It is an amenable number.

1773898145197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1773898145197 is an equidigital number, since it uses as much as digits as its factorization.

1773898145197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 106686720, while the sum is 70.

The spelling of 1773898145197 in words is "one trillion, seven hundred seventy-three billion, eight hundred ninety-eight million, one hundred forty-five thousand, one hundred ninety-seven".