161556015051116 has 48 divisors (see below), whose sum is σ = 323486384981760. Its totient is φ = 69158077369920.

The previous prime is 161556015051089. The next prime is 161556015051127. The reversal of 161556015051116 is 611150510655161.

It is a super-2 number, since 2×161556015051116² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1444097630 + ... + 1444209498.

It is an arithmetic number, because the mean of its divisors is an integer number (6739299687120).

Almost surely, 2^{161556015051116} is an apocalyptic number.

It is an amenable number.

161556015051116 is an abundant number, since it is smaller than the sum of its proper divisors (161930369930644).

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

161556015051116 is a wasteful number, since it uses less digits than its factorization.

161556015051116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171174 (or 171172 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 44.

The spelling of 161556015051116 in words is "one hundred sixty-one trillion, five hundred fifty-six billion, fifteen million, fifty-one thousand, one hundred sixteen".