6449448878 has 16 divisors (see below), whose sum is σ = 9988780416. Its totient is φ = 3119908320.

The previous prime is 6449448857. The next prime is 6449448911. The reversal of 6449448878 is 8788449446.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 6449448878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287600 + ... + 309212.

It is an arithmetic number, because the mean of its divisors is an integer number (624298776).

Almost surely, 2^6449448878 is an apocalyptic number.

6449448878 is a deficient number, since it is larger than the sum of its proper divisors (3539331538).

6449448878 is a wasteful number, since it uses less digits than its factorization.

6449448878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26459.

The product of its digits is 49545216, while the sum is 62.

The square root of 6449448878 is about 80308.4608120464. The cubic root of 6449448878 is about 1861.4049659595.

The spelling of 6449448878 in words is "six billion, four hundred forty-nine million, four hundred forty-eight thousand, eight hundred seventy-eight".