6448861355 has 4 divisors (see below), whose sum is σ = 7738633632. Its totient is φ = 5159089080.

The previous prime is 6448861339. The next prime is 6448861357. The reversal of 6448861355 is 5531688446.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6448861355 - 2⁴ = 6448861339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6448861357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644886131 + ... + 644886140.

It is an arithmetic number, because the mean of its divisors is an integer number (1934658408).

Almost surely, 2^6448861355 is an apocalyptic number.

6448861355 is a deficient number, since it is larger than the sum of its proper divisors (1289772277).

6448861355 is a wasteful number, since it uses less digits than its factorization.

6448861355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289772276.

The product of its digits is 2764800, while the sum is 50.

The square root of 6448861355 is about 80304.8028140285. The cubic root of 6448861355 is about 1861.3484416756.

The spelling of 6448861355 in words is "six billion, four hundred forty-eight million, eight hundred sixty-one thousand, three hundred fifty-five".