6449248879 has 4 divisors (see below), whose sum is σ = 6455919184. Its totient is φ = 6442578576.

The previous prime is 6449248847. The next prime is 6449248913. The reversal of 6449248879 is 9788429446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9788429446 = 2 ⋅4894214723.

It is a cyclic number.

It is not a de Polignac number, because 6449248879 - 2⁵ = 6449248847 is a prime.

It is a super-2 number, since 2×6449248879² = 83185622206565513282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6449248079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333702 + ... + 3335635.

It is an arithmetic number, because the mean of its divisors is an integer number (1613979796).

Almost surely, 2^6449248879 is an apocalyptic number.

6449248879 is a deficient number, since it is larger than the sum of its proper divisors (6670305).

6449248879 is an equidigital number, since it uses as much as digits as its factorization.

6449248879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670304.

The product of its digits is 27869184, while the sum is 61.

The square root of 6449248879 is about 80307.2156098068. The cubic root of 6449248879 is about 1861.3857248850.

The spelling of 6449248879 in words is "six billion, four hundred forty-nine million, two hundred forty-eight thousand, eight hundred seventy-nine".