6448089979 has 2 divisors, whose sum is σ = 6448089980. Its totient is φ = 6448089978.

The previous prime is 6448089943. The next prime is 6448090031. The reversal of 6448089979 is 9799808446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6448089979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6448089979.

It is not a weakly prime, because it can be changed into another prime (6448089929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224044989 + 3224044990.

It is an arithmetic number, because the mean of its divisors is an integer number (3224044990).

Almost surely, 2^6448089979 is an apocalyptic number.

6448089979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6448089979 is an equidigital number, since it uses as much as digits as its factorization.

6448089979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The square root of 6448089979 is about 80299.9998692403. Note that the first 3 decimals coincide. The cubic root of 6448089979 is about 1861.2742240896.

The spelling of 6448089979 in words is "six billion, four hundred forty-eight million, eighty-nine thousand, nine hundred seventy-nine".