161822440716 has 48 divisors (see below), whose sum is σ = 414739449600. Its totient is φ = 48880003392.

The previous prime is 161822440711. The next prime is 161822440721. The reversal of 161822440716 is 617044228161.

It is an interprime number because it is at equal distance from previous prime (161822440711) and next prime (161822440721).

It is not an unprimeable number, because it can be changed into a prime (161822440711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15424051 + ... + 15434538.

It is an arithmetic number, because the mean of its divisors is an integer number (8640405200).

Almost surely, 2^161822440716 is an apocalyptic number.

It is an amenable number.

161822440716 is an abundant number, since it is smaller than the sum of its proper divisors (252917008884).

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

161822440716 is a wasteful number, since it uses less digits than its factorization.

161822440716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30858638 (or 30858636 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

Adding to 161822440716 its reverse (617044228161), we get a palindrome (778866668877).

The spelling of 161822440716 in words is "one hundred sixty-one billion, eight hundred twenty-two million, four hundred forty thousand, seven hundred sixteen".