1605256768 has 28 divisors (see below), whose sum is σ = 3186798300. Its totient is φ = 802284032.

The previous prime is 1605256727. The next prime is 1605256789. The reversal of 1605256768 is 8676525061.

It can be written as a sum of positive squares in 2 ways, for example, as 1343075904 + 262180864 = 36648^2 + 16192^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214758 + ... + 222106.

It is an arithmetic number, because the mean of its divisors is an integer number (113814225).

Almost surely, 2^1605256768 is an apocalyptic number.

It is an amenable number.

1605256768 is a deficient number, since it is larger than the sum of its proper divisors (1581541532).

1605256768 is an equidigital number, since it uses as much as digits as its factorization.

1605256768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10774 (or 10764 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 1605256768 is about 40065.6557165860. The cubic root of 1605256768 is about 1170.8866019485.

The spelling of 1605256768 in words is "one billion, six hundred five million, two hundred fifty-six thousand, seven hundred sixty-eight".