1906799195161 has 15 divisors (see below), whose sum is σ = 2224545637343. Its totient is φ = 1634341313640.

The previous prime is 1906799195143. The next prime is 1906799195209. The reversal of 1906799195161 is 1615919976091.

The square root of 1906799195161 is 1380869.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1741394305161 + 165404890000 = 1319619^2 + 406700^2 .

It is not a de Polignac number, because 1906799195161 - 2¹⁵ = 1906799162393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1906799195093 and 1906799195102.

It is not an unprimeable number, because it can be changed into a prime (1906799195111) 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 in 14 ways as a sum of consecutive naturals, for example, 67648491 + ... + 67676671.

Almost surely, 2^{1906799195161} is an apocalyptic number.

1906799195161 is the 1380869-th square number.

1906799195161 is the 690435-th centered octagonal number.

It is an amenable number.

1906799195161 is a deficient number, since it is larger than the sum of its proper divisors (317746442182).

1906799195161 is an frugal number, since it uses more digits than its factorization.

1906799195161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56390 (or 28188 counting only the distinct ones).

The product of its (nonzero) digits is 8266860, while the sum is 64.

Multiplying 1906799195161 by its sum of digits (64), we get a square (122035148490304 = 11046952²).

The spelling of 1906799195161 in words is "one trillion, nine hundred six billion, seven hundred ninety-nine million, one hundred ninety-five thousand, one hundred sixty-one".