161522015672 has 16 divisors (see below), whose sum is σ = 303124927560. Its totient is φ = 80688701664.

The previous prime is 161522015647. The next prime is 161522015723. The reversal of 161522015672 is 276510225161.

It is a super-3 number, since 3×161522015672³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9028778 + ... + 9046649.

Almost surely, 2^161522015672 is an apocalyptic number.

It is an amenable number.

161522015672 is a deficient number, since it is larger than the sum of its proper divisors (141602911888).

161522015672 is a wasteful number, since it uses less digits than its factorization.

161522015672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18076550 (or 18076546 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 161522015672 in words is "one hundred sixty-one billion, five hundred twenty-two million, fifteen thousand, six hundred seventy-two".