198527745961 has 2 divisors, whose sum is σ = 198527745962. Its totient is φ = 198527745960.

The previous prime is 198527745953. The next prime is 198527745971. The reversal of 198527745961 is 169547725891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115572801600 + 82954944361 = 339960^2 + 288019^2 .

It is a cyclic number.

It is not a de Polignac number, because 198527745961 - 2³ = 198527745953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198527745893 and 198527745902.

It is not a weakly prime, because it can be changed into another prime (198527745971) 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, 99263872980 + 99263872981.

It is an arithmetic number, because the mean of its divisors is an integer number (99263872981).

Almost surely, 2^198527745961 is an apocalyptic number.

It is an amenable number.

198527745961 is a deficient number, since it is larger than the sum of its proper divisors (1).

198527745961 is an equidigital number, since it uses as much as digits as its factorization.

198527745961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38102400, while the sum is 64.

The spelling of 198527745961 in words is "one hundred ninety-eight billion, five hundred twenty-seven million, seven hundred forty-five thousand, nine hundred sixty-one".