640351284158 has 8 divisors (see below), whose sum is σ = 962745234528. Its totient is φ = 319436205984.

The previous prime is 640351284121. The next prime is 640351284191. The reversal of 640351284158 is 851482153046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 369716966 + ... + 369718697.

It is an arithmetic number, because the mean of its divisors is an integer number (120343154316).

Almost surely, 2^640351284158 is an apocalyptic number.

640351284158 is a deficient number, since it is larger than the sum of its proper divisors (322393950370).

640351284158 is a wasteful number, since it uses less digits than its factorization.

640351284158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739436098.

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 640351284158 in words is "six hundred forty billion, three hundred fifty-one million, two hundred eighty-four thousand, one hundred fifty-eight".