6556516215 has 16 divisors (see below), whose sum is σ = 10713627648. Its totient is φ = 3422408096.

The previous prime is 6556516177. The next prime is 6556516223. The reversal of 6556516215 is 5126156556.

It is a cyclic number.

It is not a de Polignac number, because 6556516215 - 2²² = 6552321911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4649307 + ... + 4650716.

It is an arithmetic number, because the mean of its divisors is an integer number (669601728).

Almost surely, 2^6556516215 is an apocalyptic number.

6556516215 is a deficient number, since it is larger than the sum of its proper divisors (4157111433).

6556516215 is a wasteful number, since it uses less digits than its factorization.

6556516215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300078.

The product of its digits is 270000, while the sum is 42.

The square root of 6556516215 is about 80972.3175844683. The cubic root of 6556516215 is about 1871.6488850055.

The spelling of 6556516215 in words is "six billion, five hundred fifty-six million, five hundred sixteen thousand, two hundred fifteen".