2109003639885 has 12 divisors (see below), whose sum is σ = 3655606309212. Its totient is φ = 1124801941248.

The previous prime is 2109003639881. The next prime is 2109003639989. The reversal of 2109003639885 is 5889363009012.

2109003639885 is a `hidden beast` number, since 210 + 9 + 0 + 0 + 36 + 398 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1307368133604 + 801635506281 = 1143402^2 + 895341^2 .

It is not a de Polignac number, because 2109003639885 - 2² = 2109003639881 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109003639881) 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, 23433373732 + ... + 23433373821.

It is an arithmetic number, because the mean of its divisors is an integer number (304633859101).

Almost surely, 2^{2109003639885} is an apocalyptic number.

It is an amenable number.

2109003639885 is a deficient number, since it is larger than the sum of its proper divisors (1546602669327).

2109003639885 is a wasteful number, since it uses less digits than its factorization.

2109003639885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46866747564 (or 46866747561 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 2109003639885 in words is "two trillion, one hundred nine billion, three million, six hundred thirty-nine thousand, eight hundred eighty-five".