161722015611104 has 36 divisors (see below), whose sum is σ = 344765739283056. Its totient is φ = 74640930279552.

The previous prime is 161722015611103. The next prime is 161722015611137. The reversal of 161722015611104 is 401116510227161.

It is a happy number.

161722015611104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161722015611103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14952104024 + ... + 14952114839.

It is an arithmetic number, because the mean of its divisors is an integer number (9576826091196).

Almost surely, 2^{161722015611104} is an apocalyptic number.

It is an amenable number.

161722015611104 is an abundant number, since it is smaller than the sum of its proper divisors (183043723671952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161722015611104 is a wasteful number, since it uses less digits than its factorization.

161722015611104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29904218899 (or 29904218878 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

Adding to 161722015611104 its reverse (401116510227161), we get a palindrome (562838525838265).

The spelling of 161722015611104 in words is "one hundred sixty-one trillion, seven hundred twenty-two billion, fifteen million, six hundred eleven thousand, one hundred four".