161556166060 has 12 divisors (see below), whose sum is σ = 339267948768. Its totient is φ = 64622466416.

The previous prime is 161556166039. The next prime is 161556166073. The reversal of 161556166060 is 60661655161.

It is a super-2 number, since 2×161556166060² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161556165998 and 161556166016.

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, 4038904132 + ... + 4038904171.

It is an arithmetic number, because the mean of its divisors is an integer number (28272329064).

Almost surely, 2^161556166060 is an apocalyptic number.

161556166060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161556166060 is an abundant number, since it is smaller than the sum of its proper divisors (177711782708).

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

161556166060 is a wasteful number, since it uses less digits than its factorization.

161556166060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8077808312 (or 8077808310 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 161556166060 in words is "one hundred sixty-one billion, five hundred fifty-six million, one hundred sixty-six thousand, sixty".