640200222220 has 48 divisors (see below), whose sum is σ = 1447897889088. Its totient is φ = 236371749120.

The previous prime is 640200222173. The next prime is 640200222323. The reversal of 640200222220 is 22222002046.

It is a junction number, because it is equal to n+sod(n) for n = 640200222191 and 640200222200.

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, 9836385 + ... + 9901255.

It is an arithmetic number, because the mean of its divisors is an integer number (30164539356).

Almost surely, 2^640200222220 is an apocalyptic number.

It is an amenable number.

640200222220 is an abundant number, since it is smaller than the sum of its proper divisors (807697666868).

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

640200222220 is a wasteful number, since it uses less digits than its factorization.

640200222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102850 (or 102848 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 640200222220 its reverse (22222002046), we get a palindrome (662422224266).

The spelling of 640200222220 in words is "six hundred forty billion, two hundred million, two hundred twenty-two thousand, two hundred twenty".