1647117205051 has 2 divisors, whose sum is σ = 1647117205052. Its totient is φ = 1647117205050.

The previous prime is 1647117205033. The next prime is 1647117205109. The reversal of 1647117205051 is 1505027117461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1647117205051 - 2⁹ = 1647117204539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1647117204995 and 1647117205013.

It is not a weakly prime, because it can be changed into another prime (1647117205021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823558602525 + 823558602526.

It is an arithmetic number, because the mean of its divisors is an integer number (823558602526).

Almost surely, 2^{1647117205051} is an apocalyptic number.

1647117205051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1647117205051 is an equidigital number, since it uses as much as digits as its factorization.

1647117205051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 1647117205051 in words is "one trillion, six hundred forty-seven billion, one hundred seventeen million, two hundred five thousand, fifty-one".