1091853664 has 72 divisors (see below), whose sum is σ = 2371927320. Its totient is φ = 494376960.

The previous prime is 1091853613. The next prime is 1091853667. The reversal of 1091853664 is 4663581901.

It is a self number, because there is not a number n which added to its sum of digits gives 1091853664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091853667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1622032 + ... + 1622704.

It is an arithmetic number, because the mean of its divisors is an integer number (32943435).

Almost surely, 2^1091853664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091853664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185963660).

1091853664 is an abundant number, since it is smaller than the sum of its proper divisors (1280073656).

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

1091853664 is a wasteful number, since it uses less digits than its factorization.

1091853664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1091853664 is about 33043.2090451276. The cubic root of 1091853664 is about 1029.7255258844.

The spelling of 1091853664 in words is "one billion, ninety-one million, eight hundred fifty-three thousand, six hundred sixty-four".