17956789068445 has 4 divisors (see below), whose sum is σ = 21548146882140. Its totient is φ = 14365431254752.

The previous prime is 17956789068371. The next prime is 17956789068451. The reversal of 17956789068445 is 54486098765971.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3381909966009 + 14574879102436 = 1838997^2 + 3817706^2 .

It is a cyclic number.

It is not a de Polignac number, because 17956789068445 - 2²¹ = 17956786971293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795678906840 + ... + 1795678906849.

It is an arithmetic number, because the mean of its divisors is an integer number (5387036720535).

Almost surely, 2^{17956789068445} is an apocalyptic number.

It is an amenable number.

17956789068445 is a deficient number, since it is larger than the sum of its proper divisors (3591357813695).

17956789068445 is an equidigital number, since it uses as much as digits as its factorization.

17956789068445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591357813694.

The product of its (nonzero) digits is 3657830400, while the sum is 79.

The spelling of 17956789068445 in words is "seventeen trillion, nine hundred fifty-six billion, seven hundred eighty-nine million, sixty-eight thousand, four hundred forty-five".