201947074561 has 2 divisors, whose sum is σ = 201947074562. Its totient is φ = 201947074560.

The previous prime is 201947074541. The next prime is 201947074579. The reversal of 201947074561 is 165470749102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138521674225 + 63425400336 = 372185^2 + 251844^2 .

It is a cyclic number.

It is not a de Polignac number, because 201947074561 - 2¹³ = 201947066369 is a prime.

It is not a weakly prime, because it can be changed into another prime (201947074541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100973537280 + 100973537281.

It is an arithmetic number, because the mean of its divisors is an integer number (100973537281).

Almost surely, 2^201947074561 is an apocalyptic number.

It is an amenable number.

201947074561 is a deficient number, since it is larger than the sum of its proper divisors (1).

201947074561 is an equidigital number, since it uses as much as digits as its factorization.

201947074561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 201947074561 in words is "two hundred one billion, nine hundred forty-seven million, seventy-four thousand, five hundred sixty-one".