161040445 has 8 divisors (see below), whose sum is σ = 194770944. Its totient is φ = 127817424.

The previous prime is 161040431. The next prime is 161040449. The reversal of 161040445 is 544040161.

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

It is a cyclic number.

It is not a de Polignac number, because 161040445 - 2⁹ = 161039933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161040449) 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 7 ways as a sum of consecutive naturals, for example, 126169 + ... + 127438.

It is an arithmetic number, because the mean of its divisors is an integer number (24346368).

Almost surely, 2^161040445 is an apocalyptic number.

It is an amenable number.

161040445 is a deficient number, since it is larger than the sum of its proper divisors (33730499).

161040445 is a wasteful number, since it uses less digits than its factorization.

161040445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253739.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 161040445 is about 12690.1711966388. The cubic root of 161040445 is about 544.0577327082.

The spelling of 161040445 in words is "one hundred sixty-one million, forty thousand, four hundred forty-five".