640910637003 has 32 divisors (see below), whose sum is σ = 1053910660096. Its totient is φ = 337368509568.

The previous prime is 640910636969. The next prime is 640910637047. The reversal of 640910637003 is 300736019046.

It is not a de Polignac number, because 640910637003 - 2²⁰ = 640909588427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (640910639003) 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 31 ways as a sum of consecutive naturals, for example, 2277376 + ... + 2543277.

It is an arithmetic number, because the mean of its divisors is an integer number (32934708128).

Almost surely, 2^640910637003 is an apocalyptic number.

640910637003 is a deficient number, since it is larger than the sum of its proper divisors (413000023093).

640910637003 is a wasteful number, since it uses less digits than its factorization.

640910637003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821163.

The product of its (nonzero) digits is 81648, while the sum is 39.

The spelling of 640910637003 in words is "six hundred forty billion, nine hundred ten million, six hundred thirty-seven thousand, three".