1081195668 has 96 divisors (see below), whose sum is σ = 3248824320. Its totient is φ = 304547040.

The previous prime is 1081195573. The next prime is 1081195679. The reversal of 1081195668 is 8665911801.

1081195668 is a `hidden beast` number, since 1 + 0 + 81 + 1 + 9 + 566 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43605 + ... + 63747.

It is an arithmetic number, because the mean of its divisors is an integer number (33841920).

Almost surely, 2^1081195668 is an apocalyptic number.

1081195668 is a gapful number since it is divisible by the number (18) 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 1081195668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624412160).

1081195668 is an abundant number, since it is smaller than the sum of its proper divisors (2167628652).

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

1081195668 is a wasteful number, since it uses less digits than its factorization.

1081195668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20234 (or 20226 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 1081195668 is about 32881.5399274426. The cubic root of 1081195668 is about 1026.3640512415.

The spelling of 1081195668 in words is "one billion, eighty-one million, one hundred ninety-five thousand, six hundred sixty-eight".