640105504211 has 8 divisors (see below), whose sum is σ = 658051360848. Its totient is φ = 622270768000.

The previous prime is 640105504187. The next prime is 640105504217. The reversal of 640105504211 is 112405501046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640105504211 - 2¹⁸ = 640105242067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640105504217) 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, 27768425 + ... + 27791466.

It is an arithmetic number, because the mean of its divisors is an integer number (82256420106).

Almost surely, 2^640105504211 is an apocalyptic number.

640105504211 is a deficient number, since it is larger than the sum of its proper divisors (17945856637).

640105504211 is a wasteful number, since it uses less digits than its factorization.

640105504211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55560213.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 640105504211 in words is "six hundred forty billion, one hundred five million, five hundred four thousand, two hundred eleven".