202199006561 has 2 divisors, whose sum is σ = 202199006562. Its totient is φ = 202199006560.

The previous prime is 202199006557. The next prime is 202199006617. The reversal of 202199006561 is 165600991202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166561118161 + 35637888400 = 408119^2 + 188780^2 .

It is a cyclic number.

It is not a de Polignac number, because 202199006561 - 2² = 202199006557 is a prime.

It is not a weakly prime, because it can be changed into another prime (202199006761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101099503280 + 101099503281.

It is an arithmetic number, because the mean of its divisors is an integer number (101099503281).

Almost surely, 2^202199006561 is an apocalyptic number.

It is an amenable number.

202199006561 is a deficient number, since it is larger than the sum of its proper divisors (1).

202199006561 is an equidigital number, since it uses as much as digits as its factorization.

202199006561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

Adding to 202199006561 its reverse (165600991202), we get a palindrome (367799997763).

The spelling of 202199006561 in words is "two hundred two billion, one hundred ninety-nine million, six thousand, five hundred sixty-one".