331116653355161 has 2 divisors, whose sum is σ = 331116653355162. Its totient is φ = 331116653355160.

The previous prime is 331116653355151. The next prime is 331116653355167. The reversal of 331116653355161 is 161553356611133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329799438065161 + 1317215290000 = 18160381^2 + 1147700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331116653355161 is a prime.

It is not a weakly prime, because it can be changed into another prime (331116653355167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165558326677580 + 165558326677581.

It is an arithmetic number, because the mean of its divisors is an integer number (165558326677581).

Almost surely, 2^{331116653355161} is an apocalyptic number.

It is an amenable number.

331116653355161 is a deficient number, since it is larger than the sum of its proper divisors (1).

331116653355161 is an equidigital number, since it uses as much as digits as its factorization.

331116653355161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187000, while the sum is 50.

The spelling of 331116653355161 in words is "three hundred thirty-one trillion, one hundred sixteen billion, six hundred fifty-three million, three hundred fifty-five thousand, one hundred sixty-one".