161822440717 has 64 divisors (see below), whose sum is σ = 201947074560. Its totient is φ = 126538214400.

The previous prime is 161822440711. The next prime is 161822440721. The reversal of 161822440717 is 717044228161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161822440717 is a prime.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 158804634 + ... + 158805652.

It is an arithmetic number, because the mean of its divisors is an integer number (3155423040).

Almost surely, 2^161822440717 is an apocalyptic number.

161822440717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

161822440717 is a deficient number, since it is larger than the sum of its proper divisors (40124633843).

161822440717 is a wasteful number, since it uses less digits than its factorization.

161822440717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402.

The product of its (nonzero) digits is 150528, while the sum is 43.

Adding to 161822440717 its reverse (717044228161), we get a palindrome (878866668878).

The spelling of 161822440717 in words is "one hundred sixty-one billion, eight hundred twenty-two million, four hundred forty thousand, seven hundred seventeen".