640128827142 has 48 divisors (see below), whose sum is σ = 1611946702080. Its totient is φ = 179794051056.

The previous prime is 640128827131. The next prime is 640128827161. The reversal of 640128827142 is 241728821046.

640128827142 is a `hidden beast` number, since 6 + 401 + 2 + 88 + 27 + 142 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43046698 + ... + 43061565.

It is an arithmetic number, because the mean of its divisors is an integer number (33582222960).

Almost surely, 2^640128827142 is an apocalyptic number.

640128827142 is an abundant number, since it is smaller than the sum of its proper divisors (971817874938).

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

640128827142 is a wasteful number, since it uses less digits than its factorization.

640128827142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86108337 (or 86108334 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 640128827142 in words is "six hundred forty billion, one hundred twenty-eight million, eight hundred twenty-seven thousand, one hundred forty-two".