6555820863 has 16 divisors (see below), whose sum is σ = 8781897600. Its totient is φ = 4350192096.

The previous prime is 6555820861. The next prime is 6555820867. The reversal of 6555820863 is 3680285556.

It is not a de Polignac number, because 6555820863 - 2¹ = 6555820861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555820861) 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, 609256 + ... + 619922.

It is an arithmetic number, because the mean of its divisors is an integer number (548868600).

Almost surely, 2^6555820863 is an apocalyptic number.

6555820863 is a deficient number, since it is larger than the sum of its proper divisors (2226076737).

6555820863 is a wasteful number, since it uses less digits than its factorization.

6555820863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11606.

The product of its (nonzero) digits is 1728000, while the sum is 48.

The square root of 6555820863 is about 80968.0237068931. The cubic root of 6555820863 is about 1871.5827166947.

The spelling of 6555820863 in words is "six billion, five hundred fifty-five million, eight hundred twenty thousand, eight hundred sixty-three".