200997625649 has 2 divisors, whose sum is σ = 200997625650. Its totient is φ = 200997625648.

The previous prime is 200997625639. The next prime is 200997625667. The reversal of 200997625649 is 946526799002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173022721600 + 27974904049 = 415960^2 + 167257^2 .

It is a cyclic number.

It is not a de Polignac number, because 200997625649 - 2²⁰ = 200996577073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (200997625639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100498812824 + 100498812825.

It is an arithmetic number, because the mean of its divisors is an integer number (100498812825).

Almost surely, 2^200997625649 is an apocalyptic number.

It is an amenable number.

200997625649 is a deficient number, since it is larger than the sum of its proper divisors (1).

200997625649 is an equidigital number, since it uses as much as digits as its factorization.

200997625649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 200997625649 in words is "two hundred billion, nine hundred ninety-seven million, six hundred twenty-five thousand, six hundred forty-nine".