10918561 has 2 divisors, whose sum is σ = 10918562. Its totient is φ = 10918560.

The previous prime is 10918553. The next prime is 10918577. The reversal of 10918561 is 16581901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 28561 = 3300^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 10918561 - 2³ = 10918553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10918591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5459280 + 5459281.

It is an arithmetic number, because the mean of its divisors is an integer number (5459281).

Almost surely, 2^10918561 is an apocalyptic number.

It is an amenable number.

10918561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10918561 is an equidigital number, since it uses as much as digits as its factorization.

10918561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 10918561 is about 3304.3245905934. The cubic root of 10918561 is about 221.8478044033.

The spelling of 10918561 in words is "ten million, nine hundred eighteen thousand, five hundred sixty-one".