6448863655 has 16 divisors (see below), whose sum is σ = 8511237504. Its totient is φ = 4660911360.

The previous prime is 6448863653. The next prime is 6448863679. The reversal of 6448863655 is 5563688446.

It is not a de Polignac number, because 6448863655 - 2¹ = 6448863653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6448863596 and 6448863605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6448863653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1052406 + ... + 1058515.

It is an arithmetic number, because the mean of its divisors is an integer number (531952344).

Almost surely, 2^6448863655 is an apocalyptic number.

6448863655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6448863655 is a deficient number, since it is larger than the sum of its proper divisors (2062373849).

6448863655 is a wasteful number, since it uses less digits than its factorization.

6448863655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110986.

The product of its digits is 16588800, while the sum is 55.

The square root of 6448863655 is about 80304.8171344659. The cubic root of 6448863655 is about 1861.3486629601.

The spelling of 6448863655 in words is "six billion, four hundred forty-eight million, eight hundred sixty-three thousand, six hundred fifty-five".