1081635552 has 96 divisors (see below), whose sum is σ = 3161440800. Its totient is φ = 359783424.

The previous prime is 1081635521. The next prime is 1081635587. The reversal of 1081635552 is 2555361801.

It is a happy number.

1081635552 is a `hidden beast` number, since 10 + 8 + 1 + 635 + 5 + 5 + 2 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532074 + ... + 534102.

It is an arithmetic number, because the mean of its divisors is an integer number (32931675).

Almost surely, 2^1081635552 is an apocalyptic number.

1081635552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081635552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1580720400).

1081635552 is an abundant number, since it is smaller than the sum of its proper divisors (2079805248).

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

1081635552 is a wasteful number, since it uses less digits than its factorization.

1081635552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1081635552 is about 32888.2281675374. The cubic root of 1081635552 is about 1026.5032242957.

The spelling of 1081635552 in words is "one billion, eighty-one million, six hundred thirty-five thousand, five hundred fifty-two".