1183731009541 has 2 divisors, whose sum is σ = 1183731009542. Its totient is φ = 1183731009540.

The previous prime is 1183731009533. The next prime is 1183731009581. The reversal of 1183731009541 is 1459001373811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972541130625 + 211189878916 = 986175^2 + 459554^2 .

It is an emirp because it is prime and its reverse (1459001373811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1183731009541 - 2³ = 1183731009533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1183731009511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591865504770 + 591865504771.

It is an arithmetic number, because the mean of its divisors is an integer number (591865504771).

Almost surely, 2^{1183731009541} is an apocalyptic number.

It is an amenable number.

1183731009541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1183731009541 is an equidigital number, since it uses as much as digits as its factorization.

1183731009541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 1183731009541 in words is "one trillion, one hundred eighty-three billion, seven hundred thirty-one million, nine thousand, five hundred forty-one".