161344624065 has 16 divisors (see below), whose sum is σ = 269375372928. Its totient is φ = 82309141376.

The previous prime is 161344624013. The next prime is 161344624079. The reversal of 161344624065 is 560426443161.

It is a cyclic number.

It is not a de Polignac number, because 161344624065 - 2¹⁵ = 161344591297 is a prime.

It is an unprimeable number.

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, 233832444 + ... + 233833133.

It is an arithmetic number, because the mean of its divisors is an integer number (16835960808).

Almost surely, 2^161344624065 is an apocalyptic number.

161344624065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161344624065 is a deficient number, since it is larger than the sum of its proper divisors (108030748863).

161344624065 is a wasteful number, since it uses less digits than its factorization.

161344624065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467665608.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 161344624065 in words is "one hundred sixty-one billion, three hundred forty-four million, six hundred twenty-four thousand, sixty-five".