161650172216 has 32 divisors (see below), whose sum is σ = 326495184960. Its totient is φ = 74588072832.

The previous prime is 161650172171. The next prime is 161650172221. The reversal of 161650172216 is 612271056161.

It is a super-2 number, since 2×161650172216² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161650172216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194306 + ... + 600878.

It is an arithmetic number, because the mean of its divisors is an integer number (10202974530).

Almost surely, 2^161650172216 is an apocalyptic number.

It is an amenable number.

161650172216 is an abundant number, since it is smaller than the sum of its proper divisors (164845012744).

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

161650172216 is a wasteful number, since it uses less digits than its factorization.

161650172216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410415 (or 410411 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 161650172216 in words is "one hundred sixty-one billion, six hundred fifty million, one hundred seventy-two thousand, two hundred sixteen".