1881081135 has 12 divisors (see below), whose sum is σ = 3260540712. Its totient is φ = 1003243248.

The previous prime is 1881081121. The next prime is 1881081157. The reversal of 1881081135 is 5311801881.

It is a happy number.

It is not a de Polignac number, because 1881081135 - 2⁸ = 1881080879 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1881081135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20900857 + ... + 20900946.

It is an arithmetic number, because the mean of its divisors is an integer number (271711726).

Almost surely, 2^1881081135 is an apocalyptic number.

1881081135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1881081135 is a deficient number, since it is larger than the sum of its proper divisors (1379459577).

1881081135 is a wasteful number, since it uses less digits than its factorization.

1881081135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41801814 (or 41801811 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 36.

The square root of 1881081135 is about 43371.4322452003. The cubic root of 1881081135 is about 1234.4376979829.

The spelling of 1881081135 in words is "one billion, eight hundred eighty-one million, eighty-one thousand, one hundred thirty-five".