161223022716 has 24 divisors (see below), whose sum is σ = 429928060800. Its totient is φ = 46063720752.

The previous prime is 161223022673. The next prime is 161223022717. The reversal of 161223022716 is 617220322161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161223022717) 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, 959660766 + ... + 959660933.

It is an arithmetic number, because the mean of its divisors is an integer number (17913669200).

Almost surely, 2^161223022716 is an apocalyptic number.

It is an amenable number.

161223022716 is an abundant number, since it is smaller than the sum of its proper divisors (268705038084).

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

161223022716 is a wasteful number, since it uses less digits than its factorization.

161223022716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919321713 (or 1919321711 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 161223022716 its reverse (617220322161), we get a palindrome (778443344877).

The spelling of 161223022716 in words is "one hundred sixty-one billion, two hundred twenty-three million, twenty-two thousand, seven hundred sixteen".