109881347805 has 12 divisors (see below), whose sum is σ = 190461002940. Its totient is φ = 58603385472.

The previous prime is 109881347803. The next prime is 109881347819. The reversal of 109881347805 is 508743188901.

109881347805 is a `hidden beast` number, since 1 + 0 + 98 + 81 + 3 + 478 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12989844729 + 96891503076 = 113973^2 + 311274^2 .

It is not a de Polignac number, because 109881347805 - 2¹ = 109881347803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109881347803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1220903820 + ... + 1220903909.

It is an arithmetic number, because the mean of its divisors is an integer number (15871750245).

Almost surely, 2^109881347805 is an apocalyptic number.

109881347805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109881347805 is a deficient number, since it is larger than the sum of its proper divisors (80579655135).

109881347805 is a wasteful number, since it uses less digits than its factorization.

109881347805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441807740 (or 2441807737 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 109881347805 in words is "one hundred nine billion, eight hundred eighty-one million, three hundred forty-seven thousand, eight hundred five".