2781839812203 has 24 divisors (see below), whose sum is σ = 4149381590640. Its totient is φ = 1794811919040.

The previous prime is 2781839812189. The next prime is 2781839812223. The reversal of 2781839812203 is 3022189381872.

2781839812203 is a `hidden beast` number, since 27 + 8 + 1 + 8 + 398 + 1 + 220 + 3 = 666.

It is not a de Polignac number, because 2781839812203 - 2¹⁶ = 2781839746667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2781839812203.

It is not an unprimeable number, because it can be changed into a prime (2781839812223) 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, 32931288 + ... + 33015653.

It is an arithmetic number, because the mean of its divisors is an integer number (172890899610).

Almost surely, 2^{2781839812203} is an apocalyptic number.

2781839812203 is a deficient number, since it is larger than the sum of its proper divisors (1367541778437).

2781839812203 is a wasteful number, since it uses less digits than its factorization.

2781839812203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65947099 (or 65947096 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 2781839812203 in words is "two trillion, seven hundred eighty-one billion, eight hundred thirty-nine million, eight hundred twelve thousand, two hundred three".