2050161510781 has 2 divisors, whose sum is σ = 2050161510782. Its totient is φ = 2050161510780.

The previous prime is 2050161510721. The next prime is 2050161510869. The reversal of 2050161510781 is 1870151610502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1893609927225 + 156551583556 = 1376085^2 + 395666^2 .

It is a cyclic number.

It is not a de Polignac number, because 2050161510781 - 2⁷ = 2050161510653 is a prime.

It is a super-2 number, since 2×2050161510781² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2050161510781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2050161510721) 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, 1025080755390 + 1025080755391.

It is an arithmetic number, because the mean of its divisors is an integer number (1025080755391).

Almost surely, 2^{2050161510781} is an apocalyptic number.

It is an amenable number.

2050161510781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2050161510781 is an equidigital number, since it uses as much as digits as its factorization.

2050161510781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 37.

The spelling of 2050161510781 in words is "two trillion, fifty billion, one hundred sixty-one million, five hundred ten thousand, seven hundred eighty-one".