6516578055 has 32 divisors (see below), whose sum is σ = 11235861504. Its totient is φ = 3206077056.

The previous prime is 6516578051. The next prime is 6516578069. The reversal of 6516578055 is 5508756156.

It is not a de Polignac number, because 6516578055 - 2² = 6516578051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6516577995 and 6516578013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516578051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315042 + ... + 335088.

It is an arithmetic number, because the mean of its divisors is an integer number (351120672).

Almost surely, 2^6516578055 is an apocalyptic number.

6516578055 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6516578055 is a deficient number, since it is larger than the sum of its proper divisors (4719283449).

6516578055 is a wasteful number, since it uses less digits than its factorization.

6516578055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21735.

The product of its (nonzero) digits is 1260000, while the sum is 48.

The square root of 6516578055 is about 80725.3247438497. The cubic root of 6516578055 is about 1867.8408410716.

The spelling of 6516578055 in words is "six billion, five hundred sixteen million, five hundred seventy-eight thousand, fifty-five".