981408942861 has 8 divisors (see below), whose sum is σ = 1330723990560. Its totient is φ = 643183261872.

The previous prime is 981408942859. The next prime is 981408942863. The reversal of 981408942861 is 168249804189.

It is an interprime number because it is at equal distance from previous prime (981408942859) and next prime (981408942863).

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

It is not a de Polignac number, because 981408942861 - 2¹ = 981408942859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981408942795 and 981408942804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981408942863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2772341470 + ... + 2772341823.

It is an arithmetic number, because the mean of its divisors is an integer number (166340498820).

Almost surely, 2^981408942861 is an apocalyptic number.

It is an amenable number.

981408942861 is a deficient number, since it is larger than the sum of its proper divisors (349315047699).

981408942861 is a wasteful number, since it uses less digits than its factorization.

981408942861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5544683355.

The product of its (nonzero) digits is 7962624, while the sum is 60.

The spelling of 981408942861 in words is "nine hundred eighty-one billion, four hundred eight million, nine hundred forty-two thousand, eight hundred sixty-one".