1686287744245 has 8 divisors (see below), whose sum is σ = 2179202623416. Its totient is φ = 1245258641856.

The previous prime is 1686287744231. The next prime is 1686287744303. The reversal of 1686287744245 is 5424477826861.

It can be written as a sum of positive squares in 4 ways, for example, as 398441521 + 1685889302724 = 19961^2 + 1298418^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1686287744245 - 2¹³ = 1686287736053 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12971444122 + ... + 12971444251.

It is an arithmetic number, because the mean of its divisors is an integer number (272400327927).

Almost surely, 2^{1686287744245} is an apocalyptic number.

It is an amenable number.

1686287744245 is a deficient number, since it is larger than the sum of its proper divisors (492914879171).

1686287744245 is a wasteful number, since it uses less digits than its factorization.

1686287744245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25942888391.

The product of its digits is 144506880, while the sum is 64.

The spelling of 1686287744245 in words is "one trillion, six hundred eighty-six billion, two hundred eighty-seven million, seven hundred forty-four thousand, two hundred forty-five".