10011616561 has 2 divisors, whose sum is σ = 10011616562. Its totient is φ = 10011616560.

The previous prime is 10011616481. The next prime is 10011616567. The reversal of 10011616561 is 16561611001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5484883600 + 4526732961 = 74060^2 + 67281^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011616561 - 2¹¹ = 10011614513 is a prime.

It is not a weakly prime, because it can be changed into another prime (10011616567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005808280 + 5005808281.

It is an arithmetic number, because the mean of its divisors is an integer number (5005808281).

Almost surely, 2^10011616561 is an apocalyptic number.

It is an amenable number.

10011616561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011616561 is an equidigital number, since it uses as much as digits as its factorization.

10011616561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 10011616561 in words is "ten billion, eleven million, six hundred sixteen thousand, five hundred sixty-one".