161650156612 has 18 divisors (see below), whose sum is σ = 329073533502. Its totient is φ = 69278638464.

The previous prime is 161650156607. The next prime is 161650156643. The reversal of 161650156612 is 216651056161.

It can be written as a sum of positive squares in only one way, i.e., 81919598656 + 79730557956 = 286216^2 + 282366^2 .

It is a super-2 number, since 2×161650156612² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 412372653 + ... + 412373044.

Almost surely, 2^161650156612 is an apocalyptic number.

It is an amenable number.

161650156612 is an abundant number, since it is smaller than the sum of its proper divisors (167423376890).

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

161650156612 is a wasteful number, since it uses less digits than its factorization.

161650156612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824745715 (or 824745706 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 161650156612 in words is "one hundred sixty-one billion, six hundred fifty million, one hundred fifty-six thousand, six hundred twelve".