1981006411 has 8 divisors (see below), whose sum is σ = 2005205760. Its totient is φ = 1956850368.

The previous prime is 1981006403. The next prime is 1981006421. The reversal of 1981006411 is 1146001891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1981006411 - 2³ = 1981006403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1981006421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86505 + ... + 106981.

It is an arithmetic number, because the mean of its divisors is an integer number (250650720).

Almost surely, 2^1981006411 is an apocalyptic number.

1981006411 is a deficient number, since it is larger than the sum of its proper divisors (24199349).

1981006411 is a wasteful number, since it uses less digits than its factorization.

1981006411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21653.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 1981006411 is about 44508.4981885482. The cubic root of 1981006411 is about 1255.9199534078.

The spelling of 1981006411 in words is "one billion, nine hundred eighty-one million, six thousand, four hundred eleven".