1171550720393 has 2 divisors, whose sum is σ = 1171550720394. Its totient is φ = 1171550720392.

The previous prime is 1171550720363. The next prime is 1171550720407. The reversal of 1171550720393 is 3930270551711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1170014315584 + 1536404809 = 1081672^2 + 39197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171550720393 - 2²⁸ = 1171282284937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171550720323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585775360196 + 585775360197.

It is an arithmetic number, because the mean of its divisors is an integer number (585775360197).

Almost surely, 2^{1171550720393} is an apocalyptic number.

It is an amenable number.

1171550720393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171550720393 is an equidigital number, since it uses as much as digits as its factorization.

1171550720393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198450, while the sum is 44.

The spelling of 1171550720393 in words is "one trillion, one hundred seventy-one billion, five hundred fifty million, seven hundred twenty thousand, three hundred ninety-three".