6347839938065 has 8 divisors (see below), whose sum is σ = 7661439186408. Its totient is φ = 5048917776640.

The previous prime is 6347839938061. The next prime is 6347839938103. The reversal of 6347839938065 is 5608399387436.

It is a Cunningham number, because it is equal to 2519492²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 698809058704 + 5649030879361 = 835948^2 + 2376769^2 .

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

It is not a de Polignac number, because 6347839938065 - 2² = 6347839938061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6347839938065.

It is not an unprimeable number, because it can be changed into a prime (6347839938061) 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, 3669270776 + ... + 3669272505.

It is an arithmetic number, because the mean of its divisors is an integer number (957679898301).

Almost surely, 2^{6347839938065} is an apocalyptic number.

It is an amenable number.

6347839938065 is a deficient number, since it is larger than the sum of its proper divisors (1313599248343).

6347839938065 is a wasteful number, since it uses less digits than its factorization.

6347839938065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338543459.

The product of its (nonzero) digits is 705438720, while the sum is 71.

The spelling of 6347839938065 in words is "six trillion, three hundred forty-seven billion, eight hundred thirty-nine million, nine hundred thirty-eight thousand, sixty-five".