1128641564 has 12 divisors (see below), whose sum is σ = 1993582584. Its totient is φ = 559046544.

The previous prime is 1128641551. The next prime is 1128641603. The reversal of 1128641564 is 4651468211.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318079 + ... + 1318934.

It is an arithmetic number, because the mean of its divisors is an integer number (166131882).

Almost surely, 2^1128641564 is an apocalyptic number.

It is an amenable number.

1128641564 is a deficient number, since it is larger than the sum of its proper divisors (864941020).

1128641564 is a wasteful number, since it uses less digits than its factorization.

1128641564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637124 (or 2637122 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 1128641564 is about 33595.2610348543. The cubic root of 1128641564 is about 1041.1628893046.

The spelling of 1128641564 in words is "one billion, one hundred twenty-eight million, six hundred forty-one thousand, five hundred sixty-four".