1648638647 has 2 divisors, whose sum is σ = 1648638648. Its totient is φ = 1648638646.

The previous prime is 1648638623. The next prime is 1648638671. The reversal of 1648638647 is 7468368461.

It is a balanced prime because it is at equal distance from previous prime (1648638623) and next prime (1648638671).

It is an emirp because it is prime and its reverse (7468368461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1648638647 - 2¹⁰ = 1648637623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648638697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824319323 + 824319324.

It is an arithmetic number, because the mean of its divisors is an integer number (824319324).

Almost surely, 2^1648638647 is an apocalyptic number.

1648638647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648638647 is an equidigital number, since it uses as much as digits as its factorization.

1648638647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 53.

The square root of 1648638647 is about 40603.4314682885. The cubic root of 1648638647 is about 1181.3406783799.

The spelling of 1648638647 in words is "one billion, six hundred forty-eight million, six hundred thirty-eight thousand, six hundred forty-seven".