2106640853426 has 4 divisors (see below), whose sum is σ = 3159961280142. Its totient is φ = 1053320426712.

The previous prime is 2106640853423. The next prime is 2106640853437. The reversal of 2106640853426 is 6243580466012.

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

It can be written as a sum of positive squares in only one way, i.e., 1789053378025 + 317587475401 = 1337555^2 + 563549^2 .

It is not an unprimeable number, because it can be changed into a prime (2106640853423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526660213355 + ... + 526660213358.

Almost surely, 2^{2106640853426} is an apocalyptic number.

2106640853426 is a deficient number, since it is larger than the sum of its proper divisors (1053320426716).

2106640853426 is a wasteful number, since it uses less digits than its factorization.

2106640853426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053320426715.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 2106640853426 in words is "two trillion, one hundred six billion, six hundred forty million, eight hundred fifty-three thousand, four hundred twenty-six".