161317468688777 has 8 divisors (see below), whose sum is σ = 169808024100960. Its totient is φ = 152826929508960.

The previous prime is 161317468688767. The next prime is 161317468688807. The reversal of 161317468688777 is 777886864713161.

161317468688777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161317468688777 - 2⁶ = 161317468688713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161317468688737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19997333 + ... + 26879885.

It is an arithmetic number, because the mean of its divisors is an integer number (21226003012620).

Almost surely, 2^{161317468688777} is an apocalyptic number.

It is an amenable number.

161317468688777 is a deficient number, since it is larger than the sum of its proper divisors (8490555412183).

161317468688777 is a wasteful number, since it uses less digits than its factorization.

161317468688777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116183.

The product of its digits is 3186376704, while the sum is 80.

The spelling of 161317468688777 in words is "one hundred sixty-one trillion, three hundred seventeen billion, four hundred sixty-eight million, six hundred eighty-eight thousand, seven hundred seventy-seven".