6440307711 has 16 divisors (see below), whose sum is σ = 8657806080. Its totient is φ = 4258238400.

The previous prime is 6440307661. The next prime is 6440307721. The reversal of 6440307711 is 1177030446.

It is not a de Polignac number, because 6440307711 - 2⁶ = 6440307647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440307721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423286 + ... + 438236.

It is an arithmetic number, because the mean of its divisors is an integer number (541112880).

Almost surely, 2^6440307711 is an apocalyptic number.

6440307711 is a deficient number, since it is larger than the sum of its proper divisors (2217498369).

6440307711 is a wasteful number, since it uses less digits than its factorization.

6440307711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16126.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 6440307711 is about 80251.5277798498. The cubic root of 6440307711 is about 1860.5251254608.

The spelling of 6440307711 in words is "six billion, four hundred forty million, three hundred seven thousand, seven hundred eleven".