161321885636316 has 48 divisors (see below), whose sum is σ = 376863605018880. Its totient is φ = 53710268451840.

The previous prime is 161321885636281. The next prime is 161321885636491. The reversal of 161321885636316 is 613636588123161.

It is a super-3 number, since 3×161321885636316³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161321885636316.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 625948161 + ... + 626205831.

It is an arithmetic number, because the mean of its divisors is an integer number (7851325104560).

Almost surely, 2^{161321885636316} is an apocalyptic number.

It is an amenable number.

161321885636316 is an abundant number, since it is smaller than the sum of its proper divisors (215541719382564).

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

161321885636316 is a wasteful number, since it uses less digits than its factorization.

161321885636316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319274 (or 319272 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 60.

The spelling of 161321885636316 in words is "one hundred sixty-one trillion, three hundred twenty-one billion, eight hundred eighty-five million, six hundred thirty-six thousand, three hundred sixteen".