640883485 has 16 divisors (see below), whose sum is σ = 846679680. Its totient is φ = 461816640.

The previous prime is 640883483. The next prime is 640883521. The reversal of 640883485 is 584388046.

640883485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640883485 - 2¹ = 640883483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640883483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47457 + ... + 59446.

It is an arithmetic number, because the mean of its divisors is an integer number (52917480).

Almost surely, 2^640883485 is an apocalyptic number.

It is an amenable number.

640883485 is a deficient number, since it is larger than the sum of its proper divisors (205796195).

640883485 is a wasteful number, since it uses less digits than its factorization.

640883485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107028.

The product of its (nonzero) digits is 737280, while the sum is 46.

The square root of 640883485 is about 25315.6766648652. The cubic root of 640883485 is about 862.1702375860.

The spelling of 640883485 in words is "six hundred forty million, eight hundred eighty-three thousand, four hundred eighty-five".