2107809431811 has 16 divisors (see below), whose sum is σ = 3138531818400. Its totient is φ = 1398073257504.

The previous prime is 2107809431807. The next prime is 2107809431839. The reversal of 2107809431811 is 1181349087012.

It is a happy number.

It is not a de Polignac number, because 2107809431811 - 2² = 2107809431807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2107809431311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198134316 + ... + 198144953.

It is an arithmetic number, because the mean of its divisors is an integer number (196158238650).

Almost surely, 2^{2107809431811} is an apocalyptic number.

2107809431811 is a deficient number, since it is larger than the sum of its proper divisors (1030722386589).

2107809431811 is a wasteful number, since it uses less digits than its factorization.

2107809431811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396279475 (or 396279469 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The spelling of 2107809431811 in words is "two trillion, one hundred seven billion, eight hundred nine million, four hundred thirty-one thousand, eight hundred eleven".