6511117551 has 16 divisors (see below), whose sum is σ = 8831628288. Its totient is φ = 4266063200.

The previous prime is 6511117477. The next prime is 6511117567. The reversal of 6511117551 is 1557111156.

6511117551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6511117551 - 2¹¹ = 6511115503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6511117751) 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 15 ways as a sum of consecutive naturals, for example, 19306 + ... + 115736.

It is an arithmetic number, because the mean of its divisors is an integer number (551976768).

Almost surely, 2^6511117551 is an apocalyptic number.

6511117551 is a deficient number, since it is larger than the sum of its proper divisors (2320510737).

6511117551 is a wasteful number, since it uses less digits than its factorization.

6511117551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96822.

The product of its digits is 5250, while the sum is 33.

The square root of 6511117551 is about 80691.4961504619. The cubic root of 6511117551 is about 1867.3189821838.

The spelling of 6511117551 in words is "six billion, five hundred eleven million, one hundred seventeen thousand, five hundred fifty-one".