2126322561 has 16 divisors (see below), whose sum is σ = 3227304960. Its totient is φ = 1232650320.

The previous prime is 2126322557. The next prime is 2126322577. The reversal of 2126322561 is 1652236212.

It is not a de Polignac number, because 2126322561 - 2² = 2126322557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2126327561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399981 + ... + 1401498.

It is an arithmetic number, because the mean of its divisors is an integer number (201706560).

Almost surely, 2^2126322561 is an apocalyptic number.

It is an amenable number.

2126322561 is a deficient number, since it is larger than the sum of its proper divisors (1100982399).

2126322561 is a wasteful number, since it uses less digits than its factorization.

2126322561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801516.

The product of its digits is 8640, while the sum is 30.

The square root of 2126322561 is about 46112.0652432745. The cubic root of 2126322561 is about 1285.9074597597.

Adding to 2126322561 its reverse (1652236212), we get a palindrome (3778558773).

The spelling of 2126322561 in words is "two billion, one hundred twenty-six million, three hundred twenty-two thousand, five hundred sixty-one".