1089199566 has 96 divisors (see below), whose sum is σ = 2944643520. Its totient is φ = 283295232.

The previous prime is 1089199543. The next prime is 1089199583. The reversal of 1089199566 is 6659919801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 115020 + ... + 124128.

It is an arithmetic number, because the mean of its divisors is an integer number (30673370).

Almost surely, 2^1089199566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089199566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472321760).

1089199566 is an abundant number, since it is smaller than the sum of its proper divisors (1855443954).

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

1089199566 is a wasteful number, since it uses less digits than its factorization.

1089199566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9210 (or 9207 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 1089199566 is about 33003.0235887562. The cubic root of 1089199566 is about 1028.8904903194.

The spelling of 1089199566 in words is "one billion, eighty-nine million, one hundred ninety-nine thousand, five hundred sixty-six".