2180208129911 has 4 divisors (see below), whose sum is σ = 2491666434192. Its totient is φ = 1868749825632.

The previous prime is 2180208129899. The next prime is 2180208129949. The reversal of 2180208129911 is 1199218020812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2180208129911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180208120911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155729152130 + ... + 155729152143.

It is an arithmetic number, because the mean of its divisors is an integer number (622916608548).

Almost surely, 2^{2180208129911} is an apocalyptic number.

2180208129911 is a deficient number, since it is larger than the sum of its proper divisors (311458304281).

2180208129911 is an equidigital number, since it uses as much as digits as its factorization.

2180208129911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311458304280.

The product of its (nonzero) digits is 41472, while the sum is 44.

The spelling of 2180208129911 in words is "two trillion, one hundred eighty billion, two hundred eight million, one hundred twenty-nine thousand, nine hundred eleven".