640341523311 has 32 divisors (see below), whose sum is σ = 987871342080. Its totient is φ = 361394417664.

The previous prime is 640341523247. The next prime is 640341523369. The reversal of 640341523311 is 113325143046.

It is not a de Polignac number, because 640341523311 - 2⁶ = 640341523247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640341527311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4950 + ... + 1131683.

It is an arithmetic number, because the mean of its divisors is an integer number (30870979440).

Almost surely, 2^640341523311 is an apocalyptic number.

640341523311 is a deficient number, since it is larger than the sum of its proper divisors (347529818769).

640341523311 is a wasteful number, since it uses less digits than its factorization.

640341523311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136975.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 640341523311 its reverse (113325143046), we get a palindrome (753666666357).

The spelling of 640341523311 in words is "six hundred forty billion, three hundred forty-one million, five hundred twenty-three thousand, three hundred eleven".