640436063334 has 32 divisors (see below), whose sum is σ = 1328614134144. Its totient is φ = 205657704000.

The previous prime is 640436063297. The next prime is 640436063401. The reversal of 640436063334 is 433360634046.

It is a happy number.

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, 16983292 + ... + 17020959.

It is an arithmetic number, because the mean of its divisors is an integer number (41519191692).

Almost surely, 2^640436063334 is an apocalyptic number.

640436063334 is an abundant number, since it is smaller than the sum of its proper divisors (688178070810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640436063334 is a wasteful number, since it uses less digits than its factorization.

640436063334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34004372.

The product of its (nonzero) digits is 1119744, while the sum is 42.

The spelling of 640436063334 in words is "six hundred forty billion, four hundred thirty-six million, sixty-three thousand, three hundred thirty-four".