1609141465 has 4 divisors (see below), whose sum is σ = 1930969764. Its totient is φ = 1287313168.

The previous prime is 1609141411. The next prime is 1609141481. The reversal of 1609141465 is 5641419061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5641419061 = 1429 ⋅3947809.

It can be written as a sum of positive squares in 2 ways, for example, as 595164816 + 1013976649 = 24396^2 + 31843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1609141465 - 2⁷ = 1609141337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 160914142 + ... + 160914151.

It is an arithmetic number, because the mean of its divisors is an integer number (482742441).

Almost surely, 2^1609141465 is an apocalyptic number.

It is an amenable number.

1609141465 is a deficient number, since it is larger than the sum of its proper divisors (321828299).

1609141465 is an equidigital number, since it uses as much as digits as its factorization.

1609141465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321828298.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1609141465 is about 40114.1055615104. The cubic root of 1609141465 is about 1171.8303503367.

The spelling of 1609141465 in words is "one billion, six hundred nine million, one hundred forty-one thousand, four hundred sixty-five".