161601744459 has 8 divisors (see below), whose sum is σ = 215485419520. Its totient is φ = 107726282856.

The previous prime is 161601744457. The next prime is 161601744497. The reversal of 161601744459 is 954447106161.

161601744459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161601744459 - 2¹ = 161601744457 is a prime.

It is a super-2 number, since 2×161601744459² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161601744457) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2007307 + ... + 2086260.

It is an arithmetic number, because the mean of its divisors is an integer number (26935677440).

Almost surely, 2^161601744459 is an apocalyptic number.

161601744459 is a deficient number, since it is larger than the sum of its proper divisors (53883675061).

161601744459 is a wasteful number, since it uses less digits than its factorization.

161601744459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106729.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 161601744459 in words is "one hundred sixty-one billion, six hundred one million, seven hundred forty-four thousand, four hundred fifty-nine".