2161061403349 has 2 divisors, whose sum is σ = 2161061403350. Its totient is φ = 2161061403348.

The previous prime is 2161061403287. The next prime is 2161061403401. The reversal of 2161061403349 is 9433041601612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1244050236900 + 917011166449 = 1115370^2 + 957607^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161061403349 - 2²⁷ = 2160927185621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161061400349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080530701674 + 1080530701675.

It is an arithmetic number, because the mean of its divisors is an integer number (1080530701675).

Almost surely, 2^{2161061403349} is an apocalyptic number.

It is an amenable number.

2161061403349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161061403349 is an equidigital number, since it uses as much as digits as its factorization.

2161061403349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 2161061403349 in words is "two trillion, one hundred sixty-one billion, sixty-one million, four hundred three thousand, three hundred forty-nine".