2129208543775 has 6 divisors (see below), whose sum is σ = 2640218594312. Its totient is φ = 1703366835000.

The previous prime is 2129208543751. The next prime is 2129208543797. The reversal of 2129208543775 is 5773458029212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2129208543775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42584170851 + ... + 42584170900.

Almost surely, 2^{2129208543775} is an apocalyptic number.

2129208543775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2129208543775 is a deficient number, since it is larger than the sum of its proper divisors (511010050537).

2129208543775 is an equidigital number, since it uses as much as digits as its factorization.

2129208543775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85168341761 (or 85168341756 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 2129208543775 in words is "two trillion, one hundred twenty-nine billion, two hundred eight million, five hundred forty-three thousand, seven hundred seventy-five".