1185518496961 has 2 divisors, whose sum is σ = 1185518496962. Its totient is φ = 1185518496960.

The previous prime is 1185518496917. The next prime is 1185518496979. The reversal of 1185518496961 is 1696948155811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 818834961025 + 366683535936 = 904895^2 + 605544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1185518496961 - 2¹¹ = 1185518494913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1185518496893 and 1185518496902.

It is not a weakly prime, because it can be changed into another prime (1185518496161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592759248480 + 592759248481.

It is an arithmetic number, because the mean of its divisors is an integer number (592759248481).

Almost surely, 2^{1185518496961} is an apocalyptic number.

It is an amenable number.

1185518496961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185518496961 is an equidigital number, since it uses as much as digits as its factorization.

1185518496961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18662400, while the sum is 64.

The spelling of 1185518496961 in words is "one trillion, one hundred eighty-five billion, five hundred eighteen million, four hundred ninety-six thousand, nine hundred sixty-one".