1089016566 has 32 divisors (see below), whose sum is σ = 2515805568. Its totient is φ = 310592640.

The previous prime is 1089016561. The next prime is 1089016573. The reversal of 1089016566 is 6656109801.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089016561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484180 + ... + 486423.

It is an arithmetic number, because the mean of its divisors is an integer number (78618924).

Almost surely, 2^1089016566 is an apocalyptic number.

1089016566 is an abundant number, since it is smaller than the sum of its proper divisors (1426789002).

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

1089016566 is a wasteful number, since it uses less digits than its factorization.

1089016566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970636.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1089016566 is about 33000.2509990454. The cubic root of 1089016566 is about 1028.8328646674.

The spelling of 1089016566 in words is "one billion, eighty-nine million, sixteen thousand, five hundred sixty-six".