1481981911 has 4 divisors (see below), whose sum is σ = 1504101112. Its totient is φ = 1459862712.

The previous prime is 1481981873. The next prime is 1481981929. The reversal of 1481981911 is 1191891841.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1481981911 - 2²⁵ = 1448427479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481981311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11059500 + ... + 11059633.

It is an arithmetic number, because the mean of its divisors is an integer number (376025278).

Almost surely, 2^1481981911 is an apocalyptic number.

1481981911 is a deficient number, since it is larger than the sum of its proper divisors (22119201).

1481981911 is an equidigital number, since it uses as much as digits as its factorization.

1481981911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22119200.

The product of its digits is 20736, while the sum is 43.

The square root of 1481981911 is about 38496.5181672317. The cubic root of 1481981911 is about 1140.1123083671.

The spelling of 1481981911 in words is "one billion, four hundred eighty-one million, nine hundred eighty-one thousand, nine hundred eleven".