6448344739 has 2 divisors, whose sum is σ = 6448344740. Its totient is φ = 6448344738.

The previous prime is 6448344731. The next prime is 6448344787. The reversal of 6448344739 is 9374438446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6448344739 - 2³ = 6448344731 is a prime.

It is a super-2 number, since 2×6448344739² = 83162299745977956242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6448344731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224172369 + 3224172370.

It is an arithmetic number, because the mean of its divisors is an integer number (3224172370).

Almost surely, 2^6448344739 is an apocalyptic number.

6448344739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6448344739 is an equidigital number, since it uses as much as digits as its factorization.

6448344739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 52.

The square root of 6448344739 is about 80301.5861549447. The cubic root of 6448344739 is about 1861.2987363600.

The spelling of 6448344739 in words is "six billion, four hundred forty-eight million, three hundred forty-four thousand, seven hundred thirty-nine".