1585165109 has 8 divisors (see below), whose sum is σ = 1738933920. Its totient is φ = 1433006800.

The previous prime is 1585165103. The next prime is 1585165111. The reversal of 1585165109 is 9015615851.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1585165109 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 (1585165103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400562 + ... + 404499.

It is an arithmetic number, because the mean of its divisors is an integer number (217366740).

Almost surely, 2^1585165109 is an apocalyptic number.

It is an amenable number.

1585165109 is a deficient number, since it is larger than the sum of its proper divisors (153768811).

1585165109 is a wasteful number, since it uses less digits than its factorization.

1585165109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805251.

The product of its (nonzero) digits is 54000, while the sum is 41.

The square root of 1585165109 is about 39814.1320262040. The cubic root of 1585165109 is about 1165.9810751322.

The spelling of 1585165109 in words is "one billion, five hundred eighty-five million, one hundred sixty-five thousand, one hundred nine".