640642403362170 has 32 divisors (see below), whose sum is σ = 1677318292440000. Its totient is φ = 155307249299840.

The previous prime is 640642403362163. The next prime is 640642403362231. The reversal of 640642403362170 is 71263304246046.

640642403362170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 970670307795 + ... + 970670308454.

It is an arithmetic number, because the mean of its divisors is an integer number (52416196638750).

Almost surely, 2^{640642403362170} is an apocalyptic number.

640642403362170 is an abundant number, since it is smaller than the sum of its proper divisors (1036675889077830).

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

640642403362170 is a wasteful number, since it uses less digits than its factorization.

640642403362170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941340616270.

The product of its (nonzero) digits is 3483648, while the sum is 48.

The spelling of 640642403362170 in words is "six hundred forty trillion, six hundred forty-two billion, four hundred three million, three hundred sixty-two thousand, one hundred seventy".