1881169668 has 36 divisors (see below), whose sum is σ = 5434490880. Its totient is φ = 537476976.

The previous prime is 1881169643. The next prime is 1881169673. The reversal of 1881169668 is 8669611881.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3732228 + ... + 3732731.

It is an arithmetic number, because the mean of its divisors is an integer number (150958080).

Almost surely, 2^1881169668 is an apocalyptic number.

1881169668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1881169668 is an abundant number, since it is smaller than the sum of its proper divisors (3553321212).

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

1881169668 is a wasteful number, since it uses less digits than its factorization.

1881169668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464976 (or 7464971 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 1881169668 is about 43372.4528704568. The cubic root of 1881169668 is about 1234.4570639308.

The spelling of 1881169668 in words is "one billion, eight hundred eighty-one million, one hundred sixty-nine thousand, six hundred sixty-eight".