1081553568 has 96 divisors (see below), whose sum is σ = 3003033600. Its totient is φ = 339883776.

The previous prime is 1081553567. The next prime is 1081553569. The reversal of 1081553568 is 8653551801.

It is an interprime number because it is at equal distance from previous prime (1081553567) and next prime (1081553569).

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1081553567) 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, 405423 + ... + 408081.

It is an arithmetic number, because the mean of its divisors is an integer number (31281600).

Almost surely, 2^1081553568 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 1081553568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1501516800).

1081553568 is an abundant number, since it is smaller than the sum of its proper divisors (1921480032).

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

1081553568 is a wasteful number, since it uses less digits than its factorization.

1081553568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914 (or 2906 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 42.

The square root of 1081553568 is about 32886.9817405003. The cubic root of 1081553568 is about 1026.4772885831.

The spelling of 1081553568 in words is "one billion, eighty-one million, five hundred fifty-three thousand, five hundred sixty-eight".