11681340542356 has 12 divisors (see below), whose sum is σ = 20442379060180. Its totient is φ = 5840660810880.

The previous prime is 11681340542351. The next prime is 11681340542359. The reversal of 11681340542356 is 65324504318611.

It can be written as a sum of positive squares in 2 ways, for example, as 11549353652356 + 131986890000 = 3398434^2 + 363300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11681340542351) 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 in 3 ways as a sum of consecutive naturals, for example, 920236 + ... + 4920316.

Almost surely, 2^{11681340542356} is an apocalyptic number.

It is an amenable number.

11681340542356 is a deficient number, since it is larger than the sum of its proper divisors (8761038517824).

11681340542356 is a wasteful number, since it uses less digits than its factorization.

11681340542356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730154 (or 4730152 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 11681340542356 in words is "eleven trillion, six hundred eighty-one billion, three hundred forty million, five hundred forty-two thousand, three hundred fifty-six".