161317847797 has 4 divisors (see below), whose sum is σ = 161330210080. Its totient is φ = 161305485516.

The previous prime is 161317847777. The next prime is 161317847807. The reversal of 161317847797 is 797748713161.

161317847797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161317847797 - 2³⁵ = 126958109429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161317847777) 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 3 ways as a sum of consecutive naturals, for example, 6161547 + ... + 6187672.

It is an arithmetic number, because the mean of its divisors is an integer number (40332552520).

Almost surely, 2^161317847797 is an apocalyptic number.

It is an amenable number.

161317847797 is a deficient number, since it is larger than the sum of its proper divisors (12362283).

161317847797 is a wasteful number, since it uses less digits than its factorization.

161317847797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12362282.

The product of its digits is 12446784, while the sum is 61.

The spelling of 161317847797 in words is "one hundred sixty-one billion, three hundred seventeen million, eight hundred forty-seven thousand, seven hundred ninety-seven".