1647219050513 has 2 divisors, whose sum is σ = 1647219050514. Its totient is φ = 1647219050512.

The previous prime is 1647219050473. The next prime is 1647219050551. The reversal of 1647219050513 is 3150509127461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1236962147344 + 410256903169 = 1112188^2 + 640513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1647219050513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1647219050413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823609525256 + 823609525257.

It is an arithmetic number, because the mean of its divisors is an integer number (823609525257).

Almost surely, 2^{1647219050513} is an apocalyptic number.

It is an amenable number.

1647219050513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1647219050513 is an equidigital number, since it uses as much as digits as its factorization.

1647219050513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 1647219050513 in words is "one trillion, six hundred forty-seven billion, two hundred nineteen million, fifty thousand, five hundred thirteen".