6446312718 has 16 divisors (see below), whose sum is σ = 13453174656. Its totient is φ = 2055346040.

The previous prime is 6446312713. The next prime is 6446312729. The reversal of 6446312718 is 8172136446.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6446312718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446312711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23356068 + ... + 23356343.

It is an arithmetic number, because the mean of its divisors is an integer number (840823416).

Almost surely, 2^6446312718 is an apocalyptic number.

6446312718 is an abundant number, since it is smaller than the sum of its proper divisors (7006861938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6446312718 is a wasteful number, since it uses less digits than its factorization.

6446312718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46712439.

The product of its digits is 193536, while the sum is 42.

The square root of 6446312718 is about 80288.9327242553. The cubic root of 6446312718 is about 1861.1032032101.

The spelling of 6446312718 in words is "six billion, four hundred forty-six million, three hundred twelve thousand, seven hundred eighteen".