6551551215 has 128 divisors (see below), whose sum is σ = 13530240000. Its totient is φ = 2974371840.

The previous prime is 6551551213. The next prime is 6551551231. The reversal of 6551551215 is 5121551556.

It is not a de Polignac number, because 6551551215 - 2¹ = 6551551213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6551551215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551551213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2509831 + ... + 2512439.

It is an arithmetic number, because the mean of its divisors is an integer number (105705000).

Almost surely, 2^6551551215 is an apocalyptic number.

6551551215 is an abundant number, since it is smaller than the sum of its proper divisors (6978688785).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6551551215 is a wasteful number, since it uses less digits than its factorization.

6551551215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742 (or 2736 counting only the distinct ones).

The product of its digits is 37500, while the sum is 36.

The square root of 6551551215 is about 80941.6531521318. The cubic root of 6551551215 is about 1871.1763228970.

The spelling of 6551551215 in words is "six billion, five hundred fifty-one million, five hundred fifty-one thousand, two hundred fifteen".