640144354366 has 32 divisors (see below), whose sum is σ = 1083775334400. Its totient is φ = 280903402080.

The previous prime is 640144354351. The next prime is 640144354411. The reversal of 640144354366 is 663453441046.

640144354366 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 15 ways as a sum of consecutive naturals, for example, 4988971 + ... + 5115673.

It is an arithmetic number, because the mean of its divisors is an integer number (33867979200).

Almost surely, 2^640144354366 is an apocalyptic number.

640144354366 is a deficient number, since it is larger than the sum of its proper divisors (443630980034).

640144354366 is a wasteful number, since it uses less digits than its factorization.

640144354366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134664.

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 640144354366 in words is "six hundred forty billion, one hundred forty-four million, three hundred fifty-four thousand, three hundred sixty-six".