2206626561 has 24 divisors (see below), whose sum is σ = 3206014656. Its totient is φ = 1462497120.

The previous prime is 2206626557. The next prime is 2206626581. The reversal of 2206626561 is 1656266022.

2206626561 is a `hidden beast` number, since 2 + 20 + 6 + 626 + 5 + 6 + 1 = 666.

It is not a de Polignac number, because 2206626561 - 2² = 2206626557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2206626511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1606471 + ... + 1607843.

It is an arithmetic number, because the mean of its divisors is an integer number (133583944).

Almost surely, 2^2206626561 is an apocalyptic number.

It is an amenable number.

2206626561 is a deficient number, since it is larger than the sum of its proper divisors (999388095).

2206626561 is a wasteful number, since it uses less digits than its factorization.

2206626561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2206626561 is about 46974.7438630590. The cubic root of 2206626561 is about 1301.8959634994.

The spelling of 2206626561 in words is "two billion, two hundred six million, six hundred twenty-six thousand, five hundred sixty-one".