640302106020 has 24 divisors (see below), whose sum is σ = 1792845897024. Its totient is φ = 170747228256.

The previous prime is 640302106001. The next prime is 640302106021. The reversal of 640302106020 is 20601203046.

It is not an unprimeable number, because it can be changed into a prime (640302106021) 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 7 ways as a sum of consecutive naturals, for example, 5335850824 + ... + 5335850943.

It is an arithmetic number, because the mean of its divisors is an integer number (74701912376).

Almost surely, 2^640302106020 is an apocalyptic number.

640302106020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640302106020 is an abundant number, since it is smaller than the sum of its proper divisors (1152543791004).

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

640302106020 is a wasteful number, since it uses less digits than its factorization.

640302106020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10671701779 (or 10671701777 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 640302106020 its reverse (20601203046), we get a palindrome (660903309066).

The spelling of 640302106020 in words is "six hundred forty billion, three hundred two million, one hundred six thousand, twenty".