640312030202 has 32 divisors (see below), whose sum is σ = 1076857863312. Its totient is φ = 283602415104.

The previous prime is 640312030187. The next prime is 640312030277. The reversal of 640312030202 is 202030213046.

640312030202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 266845598041 + 373466432161 = 516571^2 + 611119^2 .

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, 4488713 + ... + 4629164.

Almost surely, 2^640312030202 is an apocalyptic number.

640312030202 is a deficient number, since it is larger than the sum of its proper divisors (436545833110).

640312030202 is a wasteful number, since it uses less digits than its factorization.

640312030202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9118002.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 640312030202 its reverse (202030213046), we get a palindrome (842342243248).

The spelling of 640312030202 in words is "six hundred forty billion, three hundred twelve million, thirty thousand, two hundred two".