109905280705 has 24 divisors (see below), whose sum is σ = 145019336616. Its totient is φ = 79901690880.

The previous prime is 109905280703. The next prime is 109905280711. The reversal of 109905280705 is 507082509901.

It can be written as a sum of positive squares in 4 ways, for example, as 11125819441 + 98779461264 = 105479^2 + 314292^2 .

It is not a de Polignac number, because 109905280705 - 2¹ = 109905280703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109905280703) 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, 1684369 + ... + 1748401.

It is an arithmetic number, because the mean of its divisors is an integer number (6042472359).

Almost surely, 2^109905280705 is an apocalyptic number.

It is an amenable number.

109905280705 is a deficient number, since it is larger than the sum of its proper divisors (35114055911).

109905280705 is a wasteful number, since it uses less digits than its factorization.

109905280705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66897 (or 66886 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 109905280705 in words is "one hundred nine billion, nine hundred five million, two hundred eighty thousand, seven hundred five".