161230661541 has 16 divisors (see below), whose sum is σ = 239748206400. Its totient is φ = 107087522544.

The previous prime is 161230661531. The next prime is 161230661561. The reversal of 161230661541 is 145166032161.

161230661541 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 30 + 6 + 615 + 4 + 1 = 666.

It is not a de Polignac number, because 161230661541 - 2¹⁷ = 161230530469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161230661496 and 161230661505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161230661531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11092191 + ... + 11106716.

It is an arithmetic number, because the mean of its divisors is an integer number (14984262900).

Almost surely, 2^161230661541 is an apocalyptic number.

It is an amenable number.

161230661541 is a deficient number, since it is larger than the sum of its proper divisors (78517544859).

161230661541 is a wasteful number, since it uses less digits than its factorization.

161230661541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22199185 (or 22199179 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 161230661541 in words is "one hundred sixty-one billion, two hundred thirty million, six hundred sixty-one thousand, five hundred forty-one".