1640711875 has 20 divisors (see below), whose sum is σ = 2236627800. Its totient is φ = 1193240000.

The previous prime is 1640711873. The next prime is 1640711893. The reversal of 1640711875 is 5781170461.

It is not a de Polignac number, because 1640711875 - 2¹ = 1640711873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640711873) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 112450 + ... + 126199.

It is an arithmetic number, because the mean of its divisors is an integer number (111831390).

Almost surely, 2^1640711875 is an apocalyptic number.

1640711875 is a deficient number, since it is larger than the sum of its proper divisors (595915925).

1640711875 is an equidigital number, since it uses as much as digits as its factorization.

1640711875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238680 (or 238665 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 1640711875 is about 40505.7017591351. The cubic root of 1640711875 is about 1179.4443124724. Note that the first 3 decimals are identical.

It can be divided in two parts, 16407 and 11875, that added together give a palindrome (28282).

The spelling of 1640711875 in words is "one billion, six hundred forty million, seven hundred eleven thousand, eight hundred seventy-five".