161230445930 has 16 divisors (see below), whose sum is σ = 290257849224. Its totient is φ = 64482612480.

The previous prime is 161230445923. The next prime is 161230445933. The reversal of 161230445930 is 39544032161.

It can be written as a sum of positive squares in 4 ways, for example, as 155938901881 + 5291544049 = 394891^2 + 72743^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161230445933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124747 + ... + 1259966.

Almost surely, 2^161230445930 is an apocalyptic number.

161230445930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161230445930 is a deficient number, since it is larger than the sum of its proper divisors (129027403294).

161230445930 is a wasteful number, since it uses less digits than its factorization.

161230445930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391481.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 161230445930 in words is "one hundred sixty-one billion, two hundred thirty million, four hundred forty-five thousand, nine hundred thirty".