640321533310 has 32 divisors (see below), whose sum is σ = 1158786220032. Its totient is φ = 254750741280.

The previous prime is 640321533277. The next prime is 640321533331. The reversal of 640321533310 is 13335123046.

640321533310 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640321533310² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 3209539 + ... + 3403201.

It is an arithmetic number, because the mean of its divisors is an integer number (36212069376).

Almost surely, 2^640321533310 is an apocalyptic number.

640321533310 is a deficient number, since it is larger than the sum of its proper divisors (518464686722).

640321533310 is a wasteful number, since it uses less digits than its factorization.

640321533310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195448.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 640321533310 its reverse (13335123046), we get a palindrome (653656656356).

The spelling of 640321533310 in words is "six hundred forty billion, three hundred twenty-one million, five hundred thirty-three thousand, three hundred ten".