161530668100 has 36 divisors (see below), whose sum is σ = 352283008000. Its totient is φ = 64287574560.

The previous prime is 161530668097. The next prime is 161530668139. The reversal of 161530668100 is 1866035161.

161530668100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161530668100² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161530668100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4038660 + ... + 4078459.

Almost surely, 2^161530668100 is an apocalyptic number.

161530668100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161530668100 is an abundant number, since it is smaller than the sum of its proper divisors (190752339900).

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

161530668100 is a wasteful number, since it uses less digits than its factorization.

161530668100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8117332 (or 8117325 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 161530668100 in words is "one hundred sixty-one billion, five hundred thirty million, six hundred sixty-eight thousand, one hundred".