6511117477 has 2 divisors, whose sum is σ = 6511117478. Its totient is φ = 6511117476.

The previous prime is 6511117471. The next prime is 6511117567. The reversal of 6511117477 is 7747111156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3423537121 + 3087580356 = 58511^2 + 55566^2 .

It is a cyclic number.

It is not a de Polignac number, because 6511117477 - 2³¹ = 4363633829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6511117471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255558738 + 3255558739.

It is an arithmetic number, because the mean of its divisors is an integer number (3255558739).

Almost surely, 2^6511117477 is an apocalyptic number.

It is an amenable number.

6511117477 is a deficient number, since it is larger than the sum of its proper divisors (1).

6511117477 is an equidigital number, since it uses as much as digits as its factorization.

6511117477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41160, while the sum is 40.

The square root of 6511117477 is about 80691.4956919253. The cubic root of 6511117477 is about 1867.3189751097.

The spelling of 6511117477 in words is "six billion, five hundred eleven million, one hundred seventeen thousand, four hundred seventy-seven".