640143220462 has 4 divisors (see below), whose sum is σ = 960214830696. Its totient is φ = 320071610230.

The previous prime is 640143220441. The next prime is 640143220471. The reversal of 640143220462 is 264022341046.

640143220462 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160035805114 + ... + 160035805117.

It is an arithmetic number, because the mean of its divisors is an integer number (240053707674).

Almost surely, 2^640143220462 is an apocalyptic number.

640143220462 is a deficient number, since it is larger than the sum of its proper divisors (320071610234).

640143220462 is a wasteful number, since it uses less digits than its factorization.

640143220462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320071610233.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 640143220462 in words is "six hundred forty billion, one hundred forty-three million, two hundred twenty thousand, four hundred sixty-two".