6515455477 has 2 divisors, whose sum is σ = 6515455478. Its totient is φ = 6515455476.

The previous prime is 6515455409. The next prime is 6515455483. The reversal of 6515455477 is 7745545156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6127601841 + 387853636 = 78279^2 + 19694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6515455477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6515455477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6515455577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3257727738 + 3257727739.

It is an arithmetic number, because the mean of its divisors is an integer number (3257727739).

Almost surely, 2^6515455477 is an apocalyptic number.

It is an amenable number.

6515455477 is a deficient number, since it is larger than the sum of its proper divisors (1).

6515455477 is an equidigital number, since it uses as much as digits as its factorization.

6515455477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940000, while the sum is 49.

The square root of 6515455477 is about 80718.3713723214. The cubic root of 6515455477 is about 1867.7335804085.

The spelling of 6515455477 in words is "six billion, five hundred fifteen million, four hundred fifty-five thousand, four hundred seventy-seven".