640502016830 has 32 divisors (see below), whose sum is σ = 1245975835104. Its totient is φ = 235657374336.

The previous prime is 640502016793. The next prime is 640502016839. The reversal of 640502016830 is 38610205046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640502016839) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8668049 + ... + 8741628.

It is an arithmetic number, because the mean of its divisors is an integer number (38936744847).

Almost surely, 2^640502016830 is an apocalyptic number.

640502016830 is a deficient number, since it is larger than the sum of its proper divisors (605473818274).

640502016830 is a wasteful number, since it uses less digits than its factorization.

640502016830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17409980.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 640502016830 in words is "six hundred forty billion, five hundred two million, sixteen thousand, eight hundred thirty".