1209796064161 has 4 divisors (see below), whose sum is σ = 1209806810800. Its totient is φ = 1209785317524.

The previous prime is 1209796064119. The next prime is 1209796064179. The reversal of 1209796064161 is 1614606979021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1209796064161 - 2¹⁵ = 1209796031393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1209796064099 and 1209796064108.

It is not an unprimeable number, because it can be changed into a prime (1209796062161) 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 3 ways as a sum of consecutive naturals, for example, 5202651 + ... + 5430208.

It is an arithmetic number, because the mean of its divisors is an integer number (302451702700).

Almost surely, 2^{1209796064161} is an apocalyptic number.

It is an amenable number.

1209796064161 is a deficient number, since it is larger than the sum of its proper divisors (10746639).

1209796064161 is a wasteful number, since it uses less digits than its factorization.

1209796064161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10746638.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 1209796064161 in words is "one trillion, two hundred nine billion, seven hundred ninety-six million, sixty-four thousand, one hundred sixty-one".