1608434865 has 24 divisors (see below), whose sum is σ = 2823250560. Its totient is φ = 846971424.

The previous prime is 1608434851. The next prime is 1608434869. The reversal of 1608434865 is 5684348061.

1608434865 is a `hidden beast` number, since 1 + 608 + 4 + 34 + 8 + 6 + 5 = 666.

It is not a de Polignac number, because 1608434865 - 2⁵ = 1608434833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1608434865.

It is not an unprimeable number, because it can be changed into a prime (1608434869) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 222667 + ... + 229776.

It is an arithmetic number, because the mean of its divisors is an integer number (117635440).

Almost surely, 2^1608434865 is an apocalyptic number.

1608434865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1608434865 is a deficient number, since it is larger than the sum of its proper divisors (1214815695).

1608434865 is a wasteful number, since it uses less digits than its factorization.

1608434865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452533 (or 452530 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 1608434865 is about 40105.2972186967. The cubic root of 1608434865 is about 1171.6588020150.

The spelling of 1608434865 in words is "one billion, six hundred eight million, four hundred thirty-four thousand, eight hundred sixty-five".