1126651644 has 36 divisors (see below), whose sum is σ = 2850500016. Its totient is φ = 375211008.

The previous prime is 1126651613. The next prime is 1126651657. The reversal of 1126651644 is 4461566211.

1126651644 is a `hidden beast` number, since 1 + 1 + 2 + 6 + 6 + 5 + 1 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1126651599 and 1126651608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27937 + ... + 55079.

It is an arithmetic number, because the mean of its divisors is an integer number (79180556).

Almost surely, 2^1126651644 is an apocalyptic number.

It is an amenable number.

1126651644 is an abundant number, since it is smaller than the sum of its proper divisors (1723848372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1126651644 is a wasteful number, since it uses less digits than its factorization.

1126651644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28306 (or 28301 counting only the distinct ones).

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

The square root of 1126651644 is about 33565.6318873934. The cubic root of 1126651644 is about 1040.5506342009.

The spelling of 1126651644 in words is "one billion, one hundred twenty-six million, six hundred fifty-one thousand, six hundred forty-four".