1165653552961 has 2 divisors, whose sum is σ = 1165653552962. Its totient is φ = 1165653552960.

The previous prime is 1165653552913. The next prime is 1165653553007. The reversal of 1165653552961 is 1692553565611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1134225000000 + 31428552961 = 1065000^2 + 177281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165653552961 - 2¹¹ = 1165653550913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165653562961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582826776480 + 582826776481.

It is an arithmetic number, because the mean of its divisors is an integer number (582826776481).

Almost surely, 2^{1165653552961} is an apocalyptic number.

It is an amenable number.

1165653552961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165653552961 is an equidigital number, since it uses as much as digits as its factorization.

1165653552961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290000, while the sum is 55.

The spelling of 1165653552961 in words is "one trillion, one hundred sixty-five billion, six hundred fifty-three million, five hundred fifty-two thousand, nine hundred sixty-one".