10990198061 has 2 divisors, whose sum is σ = 10990198062. Its totient is φ = 10990198060.

The previous prime is 10990198057. The next prime is 10990198073. The reversal of 10990198061 is 16089109901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10076345161 + 913852900 = 100381^2 + 30230^2 .

It is a cyclic number.

It is not a de Polignac number, because 10990198061 - 2² = 10990198057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10990198001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5495099030 + 5495099031.

It is an arithmetic number, because the mean of its divisors is an integer number (5495099031).

Almost surely, 2^10990198061 is an apocalyptic number.

It is an amenable number.

10990198061 is a deficient number, since it is larger than the sum of its proper divisors (1).

10990198061 is an equidigital number, since it uses as much as digits as its factorization.

10990198061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 44.

The spelling of 10990198061 in words is "ten billion, nine hundred ninety million, one hundred ninety-eight thousand, sixty-one".