161566616115576 has 96 divisors (see below), whose sum is σ = 500092933073760. Its totient is φ = 46161356046336.

The previous prime is 161566616115571. The next prime is 161566616115587. The reversal of 161566616115576 is 675511616665161.

It is a super-3 number, since 3×161566616115576³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161566616115571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42799696 + ... + 46421408.

It is an arithmetic number, because the mean of its divisors is an integer number (5209301386185).

Almost surely, 2^{161566616115576} is an apocalyptic number.

It is an amenable number.

161566616115576 is an abundant number, since it is smaller than the sum of its proper divisors (338526316958184).

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

161566616115576 is a wasteful number, since it uses less digits than its factorization.

161566616115576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710245 (or 3710238 counting only the distinct ones).

The product of its digits is 40824000, while the sum is 63.

The spelling of 161566616115576 in words is "one hundred sixty-one trillion, five hundred sixty-six billion, six hundred sixteen million, one hundred fifteen thousand, five hundred seventy-six".