161440345 has 8 divisors (see below), whose sum is σ = 211340160. Its totient is φ = 117411120.

The previous prime is 161440333. The next prime is 161440369. The reversal of 161440345 is 543044161.

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

It is not a de Polignac number, because 161440345 - 2⁹ = 161439833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467585 + ... + 1467694.

It is an arithmetic number, because the mean of its divisors is an integer number (26417520).

Almost surely, 2^161440345 is an apocalyptic number.

It is an amenable number.

161440345 is a deficient number, since it is larger than the sum of its proper divisors (49899815).

161440345 is a wasteful number, since it uses less digits than its factorization.

161440345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935295.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 161440345 is about 12705.9177157732. The cubic root of 161440345 is about 544.5077000949.

The spelling of 161440345 in words is "one hundred sixty-one million, four hundred forty thousand, three hundred forty-five".