6440306404211 has 4 divisors (see below), whose sum is σ = 6440429959272. Its totient is φ = 6440182849152.

The previous prime is 6440306404199. The next prime is 6440306404331. The reversal of 6440306404211 is 1124046030446.

6440306404211 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6440306404211 - 2¹⁰ = 6440306403187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440306407211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61699310 + ... + 61803603.

It is an arithmetic number, because the mean of its divisors is an integer number (1610107489818).

Almost surely, 2^{6440306404211} is an apocalyptic number.

6440306404211 is a deficient number, since it is larger than the sum of its proper divisors (123555061).

6440306404211 is a wasteful number, since it uses less digits than its factorization.

6440306404211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123555060.

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 6440306404211 in words is "six trillion, four hundred forty billion, three hundred six million, four hundred four thousand, two hundred eleven".