161641107 has 12 divisors (see below), whose sum is σ = 235794624. Its totient is φ = 106693200.

The previous prime is 161641087. The next prime is 161641111. The reversal of 161641107 is 701146161.

161641107 is a `hidden beast` number, since 1 + 6 + 1 + 641 + 10 + 7 = 666.

It is not a de Polignac number, because 161641107 - 2⁷ = 161640979 is a prime.

It is a super-2 number, since 2×161641107² = 52255694944370898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161648107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88003 + ... + 89820.

It is an arithmetic number, because the mean of its divisors is an integer number (19649552).

Almost surely, 2^161641107 is an apocalyptic number.

161641107 is a deficient number, since it is larger than the sum of its proper divisors (74153517).

161641107 is a wasteful number, since it uses less digits than its factorization.

161641107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177930 (or 177927 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 161641107 is about 12713.8155956424. The cubic root of 161641107 is about 544.7333173283.

Adding to 161641107 its reverse (701146161), we get a palindrome (862787268).

It can be divided in two parts, 16164 and 1107, that added together give a palindrome (17271).

The spelling of 161641107 in words is "one hundred sixty-one million, six hundred forty-one thousand, one hundred seven".