1647952209061 has 2 divisors, whose sum is σ = 1647952209062. Its totient is φ = 1647952209060.

The previous prime is 1647952209031. The next prime is 1647952209091. The reversal of 1647952209061 is 1609022597461.

It is a balanced prime because it is at equal distance from previous prime (1647952209031) and next prime (1647952209091).

It can be written as a sum of positive squares in only one way, i.e., 1630294848900 + 17657360161 = 1276830^2 + 132881^2 .

It is an emirp because it is prime and its reverse (1609022597461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1647952209061 - 2¹⁵ = 1647952176293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1647952209031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823976104530 + 823976104531.

It is an arithmetic number, because the mean of its divisors is an integer number (823976104531).

Almost surely, 2^{1647952209061} is an apocalyptic number.

It is an amenable number.

1647952209061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1647952209061 is an equidigital number, since it uses as much as digits as its factorization.

1647952209061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 1647952209061 in words is "one trillion, six hundred forty-seven billion, nine hundred fifty-two million, two hundred nine thousand, sixty-one".