2648778487 has 2 divisors, whose sum is σ = 2648778488. Its totient is φ = 2648778486.

The previous prime is 2648778437. The next prime is 2648778523. The reversal of 2648778487 is 7848778462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2648778487 - 2⁷ = 2648778359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2648778437) 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, 1324389243 + 1324389244.

It is an arithmetic number, because the mean of its divisors is an integer number (1324389244).

Almost surely, 2^2648778487 is an apocalyptic number.

2648778487 is a deficient number, since it is larger than the sum of its proper divisors (1).

2648778487 is an equidigital number, since it uses as much as digits as its factorization.

2648778487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33718272, while the sum is 61.

The square root of 2648778487 is about 51466.2849543271. The cubic root of 2648778487 is about 1383.6148466538.

The spelling of 2648778487 in words is "two billion, six hundred forty-eight million, seven hundred seventy-eight thousand, four hundred eighty-seven".