200717642549 has 2 divisors, whose sum is σ = 200717642550. Its totient is φ = 200717642548.

The previous prime is 200717642507. The next prime is 200717642557. The reversal of 200717642549 is 945246717002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189753458449 + 10964184100 = 435607^2 + 104710^2 .

It is a cyclic number.

It is not a de Polignac number, because 200717642549 - 2¹⁶ = 200717577013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200717642599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100358821274 + 100358821275.

It is an arithmetic number, because the mean of its divisors is an integer number (100358821275).

Almost surely, 2^200717642549 is an apocalyptic number.

It is an amenable number.

200717642549 is a deficient number, since it is larger than the sum of its proper divisors (1).

200717642549 is an equidigital number, since it uses as much as digits as its factorization.

200717642549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 200717642549 in words is "two hundred billion, seven hundred seventeen million, six hundred forty-two thousand, five hundred forty-nine".