6487709745877 has 2 divisors, whose sum is σ = 6487709745878. Its totient is φ = 6487709745876.

The previous prime is 6487709745821. The next prime is 6487709745889. The reversal of 6487709745877 is 7785479077846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4314535505316 + 2173174240561 = 2077146^2 + 1474169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6487709745877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6487709745797 and 6487709745806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6487709745817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3243854872938 + 3243854872939.

It is an arithmetic number, because the mean of its divisors is an integer number (3243854872939).

Almost surely, 2^{6487709745877} is an apocalyptic number.

It is an amenable number.

6487709745877 is a deficient number, since it is larger than the sum of its proper divisors (1).

6487709745877 is an equidigital number, since it uses as much as digits as its factorization.

6487709745877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4646799360, while the sum is 79.

The spelling of 6487709745877 in words is "six trillion, four hundred eighty-seven billion, seven hundred nine million, seven hundred forty-five thousand, eight hundred seventy-seven".