1391669633161 has 2 divisors, whose sum is σ = 1391669633162. Its totient is φ = 1391669633160.

The previous prime is 1391669633129. The next prime is 1391669633219. The reversal of 1391669633161 is 1613369661931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 964549873225 + 427119759936 = 982115^2 + 653544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391669633161 - 2⁵ = 1391669633129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1391669633261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695834816580 + 695834816581.

It is an arithmetic number, because the mean of its divisors is an integer number (695834816581).

Almost surely, 2^{1391669633161} is an apocalyptic number.

It is an amenable number.

1391669633161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391669633161 is an equidigital number, since it uses as much as digits as its factorization.

1391669633161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352, while the sum is 55.

The spelling of 1391669633161 in words is "one trillion, three hundred ninety-one billion, six hundred sixty-nine million, six hundred thirty-three thousand, one hundred sixty-one".