165622176656 has 20 divisors (see below), whose sum is σ = 322085886300. Its totient is φ = 82503238272.

The previous prime is 165622176641. The next prime is 165622176659. The reversal of 165622176656 is 656671226561.

It can be written as a sum of positive squares in 2 ways, for example, as 34276819600 + 131345357056 = 185140^2 + 362416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 165622176598 and 165622176607.

It is not an unprimeable number, because it can be changed into a prime (165622176659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19236191 + ... + 19244798.

It is an arithmetic number, because the mean of its divisors is an integer number (16104294315).

Almost surely, 2^165622176656 is an apocalyptic number.

165622176656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165622176656 is a deficient number, since it is larger than the sum of its proper divisors (156463709644).

165622176656 is a wasteful number, since it uses less digits than its factorization.

165622176656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38481266 (or 38481260 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 53.

The spelling of 165622176656 in words is "one hundred sixty-five billion, six hundred twenty-two million, one hundred seventy-six thousand, six hundred fifty-six".