6487815647 has 2 divisors, whose sum is σ = 6487815648. Its totient is φ = 6487815646.

The previous prime is 6487815617. The next prime is 6487815673. The reversal of 6487815647 is 7465187846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6487815647 - 2⁶ = 6487815583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6487815592 and 6487815601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6487815617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3243907823 + 3243907824.

It is an arithmetic number, because the mean of its divisors is an integer number (3243907824).

Almost surely, 2^6487815647 is an apocalyptic number.

6487815647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6487815647 is an equidigital number, since it uses as much as digits as its factorization.

6487815647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9031680, while the sum is 56.

The square root of 6487815647 is about 80546.9778886831. The cubic root of 6487815647 is about 1865.0887404677.

The spelling of 6487815647 in words is "six billion, four hundred eighty-seven million, eight hundred fifteen thousand, six hundred forty-seven".