1081191168 has 54 divisors (see below), whose sum is σ = 3117347324. Its totient is φ = 360396288.

The previous prime is 1081191161. The next prime is 1081191169. The reversal of 1081191168 is 8611911801.

It is a super-2 number, since 2×1081191168² = 2337948683522408448, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1081191161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232330 + ... + 236937.

Almost surely, 2^1081191168 is an apocalyptic number.

1081191168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1081191168 is an abundant number, since it is smaller than the sum of its proper divisors (2036156156).

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

1081191168 is an equidigital number, since it uses as much as digits as its factorization.

1081191168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469289 (or 469272 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 36.

The square root of 1081191168 is about 32881.4714999192. The cubic root of 1081191168 is about 1026.3626273104.

The spelling of 1081191168 in words is "one billion, eighty-one million, one hundred ninety-one thousand, one hundred sixty-eight".