6511115051555 has 32 divisors (see below), whose sum is σ = 8189017221120. Its totient is φ = 4963650658560.

The previous prime is 6511115051543. The next prime is 6511115051591. The reversal of 6511115051555 is 5551505111156.

6511115051555 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-6511115051555 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26244047 + ... + 26490983.

It is an arithmetic number, because the mean of its divisors is an integer number (255906788160).

Almost surely, 2^{6511115051555} is an apocalyptic number.

6511115051555 is a deficient number, since it is larger than the sum of its proper divisors (1677902169565).

6511115051555 is a wasteful number, since it uses less digits than its factorization.

6511115051555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249579.

The product of its (nonzero) digits is 93750, while the sum is 41.

The spelling of 6511115051555 in words is "six trillion, five hundred eleven billion, one hundred fifteen million, fifty-one thousand, five hundred fifty-five".