2126543778475 has 12 divisors (see below), whose sum is σ = 2708182240144. Its totient is φ = 1655255697120.

The previous prime is 2126543778439. The next prime is 2126543778481. The reversal of 2126543778475 is 5748773456212.

It is a de Polignac number, because none of the positive numbers 2^k-2126543778475 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1149482199 + ... + 1149484048.

Almost surely, 2^{2126543778475} is an apocalyptic number.

2126543778475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2126543778475 is a deficient number, since it is larger than the sum of its proper divisors (581638461669).

2126543778475 is a wasteful number, since it uses less digits than its factorization.

2126543778475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298966294 (or 2298966289 counting only the distinct ones).

The product of its digits is 79027200, while the sum is 61.

The spelling of 2126543778475 in words is "two trillion, one hundred twenty-six billion, five hundred forty-three million, seven hundred seventy-eight thousand, four hundred seventy-five".