1648647877 has 2 divisors, whose sum is σ = 1648647878. Its totient is φ = 1648647876.

The previous prime is 1648647863. The next prime is 1648647893. The reversal of 1648647877 is 7787468461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 889590276 + 759057601 = 29826^2 + 27551^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648647877 - 2¹¹ = 1648645829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648647857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824323938 + 824323939.

It is an arithmetic number, because the mean of its divisors is an integer number (824323939).

Almost surely, 2^1648647877 is an apocalyptic number.

It is an amenable number.

1648647877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648647877 is an equidigital number, since it uses as much as digits as its factorization.

1648647877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12644352, while the sum is 58.

The square root of 1648647877 is about 40603.5451284737. The cubic root of 1648647877 is about 1181.3428829775.

The spelling of 1648647877 in words is "one billion, six hundred forty-eight million, six hundred forty-seven thousand, eight hundred seventy-seven".