1585165964 has 12 divisors (see below), whose sum is σ = 2782905384. Its totient is φ = 790050144.

The previous prime is 1585165943. The next prime is 1585165973. The reversal of 1585165964 is 4695615851.

It is a happy number.

It is a super-2 number, since 2×1585165964² = 5025502266848098592, which contains 22 as substring.

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, 631802 + ... + 634305.

It is an arithmetic number, because the mean of its divisors is an integer number (231908782).

Almost surely, 2^1585165964 is an apocalyptic number.

It is an amenable number.

1585165964 is a deficient number, since it is larger than the sum of its proper divisors (1197739420).

1585165964 is a wasteful number, since it uses less digits than its factorization.

1585165964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266424 (or 1266422 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 50.

The square root of 1585165964 is about 39814.1427635960. The cubic root of 1585165964 is about 1165.9812847662.

The spelling of 1585165964 in words is "one billion, five hundred eighty-five million, one hundred sixty-five thousand, nine hundred sixty-four".