109144983981 has 24 divisors (see below), whose sum is σ = 161886301920. Its totient is φ = 65351487520.

The previous prime is 109144983971. The next prime is 109144984007. The reversal of 109144983981 is 189389441901.

It is not a de Polignac number, because 109144983981 - 2¹⁷ = 109144852909 is a prime.

It is a super-2 number, since 2×109144983981² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109144983911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1781166 + ... + 1841423.

It is an arithmetic number, because the mean of its divisors is an integer number (6745262580).

Almost surely, 2^109144983981 is an apocalyptic number.

109144983981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

109144983981 is a deficient number, since it is larger than the sum of its proper divisors (52741317939).

109144983981 is a wasteful number, since it uses less digits than its factorization.

109144983981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622697 (or 3622686 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 57.

The spelling of 109144983981 in words is "one hundred nine billion, one hundred forty-four million, nine hundred eighty-three thousand, nine hundred eighty-one".