1183946221657 has 2 divisors, whose sum is σ = 1183946221658. Its totient is φ = 1183946221656.

The previous prime is 1183946221639. The next prime is 1183946221723. The reversal of 1183946221657 is 7561226493811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1078515482256 + 105430739401 = 1038516^2 + 324701^2 .

It is a cyclic number.

It is not a de Polignac number, because 1183946221657 - 2¹¹ = 1183946219609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1183946221598 and 1183946221607.

It is not a weakly prime, because it can be changed into another prime (1183946221457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591973110828 + 591973110829.

It is an arithmetic number, because the mean of its divisors is an integer number (591973110829).

Almost surely, 2^{1183946221657} is an apocalyptic number.

It is an amenable number.

1183946221657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1183946221657 is an equidigital number, since it uses as much as digits as its factorization.

1183946221657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The spelling of 1183946221657 in words is "one trillion, one hundred eighty-three billion, nine hundred forty-six million, two hundred twenty-one thousand, six hundred fifty-seven".