161782514211 has 96 divisors (see below), whose sum is σ = 259460167680. Its totient is φ = 89010662400.

The previous prime is 161782514189. The next prime is 161782514227. The reversal of 161782514211 is 112415287161.

It is a happy number.

161782514211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161782514211 - 2⁶ = 161782514147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161782514211.

It is not an unprimeable number, because it can be changed into a prime (161782512211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15885541 + ... + 15895721.

It is an arithmetic number, because the mean of its divisors is an integer number (2702710080).

Almost surely, 2^161782514211 is an apocalyptic number.

161782514211 is a deficient number, since it is larger than the sum of its proper divisors (97677653469).

161782514211 is a wasteful number, since it uses less digits than its factorization.

161782514211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10297 (or 10274 counting only the distinct ones).

The product of its digits is 26880, while the sum is 39.

The spelling of 161782514211 in words is "one hundred sixty-one billion, seven hundred eighty-two million, five hundred fourteen thousand, two hundred eleven".