3437516778161 has 2 divisors, whose sum is σ = 3437516778162. Its totient is φ = 3437516778160.

The previous prime is 3437516778139. The next prime is 3437516778169. The reversal of 3437516778161 is 1618776157343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3076849269025 + 360667509136 = 1754095^2 + 600556^2 .

It is an emirp because it is prime and its reverse (1618776157343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3437516778161 - 2⁶ = 3437516778097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3437516778161.

It is not a weakly prime, because it can be changed into another prime (3437516778169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1718758389080 + 1718758389081.

It is an arithmetic number, because the mean of its divisors is an integer number (1718758389081).

Almost surely, 2^{3437516778161} is an apocalyptic number.

It is an amenable number.

3437516778161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3437516778161 is an equidigital number, since it uses as much as digits as its factorization.

3437516778161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 59.

The spelling of 3437516778161 in words is "three trillion, four hundred thirty-seven billion, five hundred sixteen million, seven hundred seventy-eight thousand, one hundred sixty-one".