161045340 has 48 divisors (see below), whose sum is σ = 454936608. Its totient is φ = 42563584.

The previous prime is 161045329. The next prime is 161045347. The reversal of 161045340 is 43540161.

It is a self number, because there is not a number n which added to its sum of digits gives 161045340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161045347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5097 + ... + 18656.

It is an arithmetic number, because the mean of its divisors is an integer number (9477846).

Almost surely, 2^161045340 is an apocalyptic number.

161045340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161045340 is an abundant number, since it is smaller than the sum of its proper divisors (293891268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161045340 is a wasteful number, since it uses less digits than its factorization.

161045340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23878 (or 23876 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 161045340 is about 12690.3640609716. The cubic root of 161045340 is about 544.0632450618.

The spelling of 161045340 in words is "one hundred sixty-one million, forty-five thousand, three hundred forty".