12001854641698 has 4 divisors (see below), whose sum is σ = 18002781962550. Its totient is φ = 6000927320848.

The previous prime is 12001854641683. The next prime is 12001854641717. The reversal of 12001854641698 is 89614645810021.

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., 7231941857529 + 4769912784169 = 2689227^2 + 2184013^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3000463660423 + ... + 3000463660426.

Almost surely, 2^{12001854641698} is an apocalyptic number.

12001854641698 is a deficient number, since it is larger than the sum of its proper divisors (6000927320852).

12001854641698 is an equidigital number, since it uses as much as digits as its factorization.

12001854641698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6000927320851.

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 12001854641698 in words is "twelve trillion, one billion, eight hundred fifty-four million, six hundred forty-one thousand, six hundred ninety-eight".