640147854206 has 16 divisors (see below), whose sum is σ = 1097429078016. Its totient is φ = 274340891256.

The previous prime is 640147854163. The next prime is 640147854239. The reversal of 640147854206 is 602458741046.

It is a happy number.

640147854206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184106 + ... + 1146381.

It is an arithmetic number, because the mean of its divisors is an integer number (68589317376).

Almost surely, 2^640147854206 is an apocalyptic number.

640147854206 is a deficient number, since it is larger than the sum of its proper divisors (457281223810).

640147854206 is a wasteful number, since it uses less digits than its factorization.

640147854206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364863.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 640147854206 in words is "six hundred forty billion, one hundred forty-seven million, eight hundred fifty-four thousand, two hundred six".