1126644561 has 36 divisors (see below), whose sum is σ = 1911628992. Its totient is φ = 626349024.

The previous prime is 1126644557. The next prime is 1126644599. The reversal of 1126644561 is 1654466211.

1126644561 is a `hidden beast` number, since 1 + 1 + 2 + 6 + 644 + 5 + 6 + 1 = 666.

It is not a de Polignac number, because 1126644561 - 2² = 1126644557 is a prime.

It is a super-3 number, since 3×1126644561³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1126644521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 79716 + ... + 92778.

Almost surely, 2^1126644561 is an apocalyptic number.

It is an amenable number.

1126644561 is a deficient number, since it is larger than the sum of its proper divisors (784984431).

1126644561 is a wasteful number, since it uses less digits than its factorization.

1126644561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13150 (or 13110 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1126644561 is about 33565.5263775201. The cubic root of 1126644561 is about 1040.5484536288.

The spelling of 1126644561 in words is "one billion, one hundred twenty-six million, six hundred forty-four thousand, five hundred sixty-one".