640873852311 has 64 divisors (see below), whose sum is σ = 1095661264896. Its totient is φ = 323527478400.

The previous prime is 640873852303. The next prime is 640873852337. The reversal of 640873852311 is 113258378046.

It is not a de Polignac number, because 640873852311 - 2³ = 640873852303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640873852301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1793046 + ... + 2120556.

It is an arithmetic number, because the mean of its divisors is an integer number (17119707264).

Almost surely, 2^640873852311 is an apocalyptic number.

640873852311 is a deficient number, since it is larger than the sum of its proper divisors (454787412585).

640873852311 is a wasteful number, since it uses less digits than its factorization.

640873852311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327772.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 640873852311 in words is "six hundred forty billion, eight hundred seventy-three million, eight hundred fifty-two thousand, three hundred eleven".