1687661652743 has 8 divisors (see below), whose sum is σ = 1867016221056. Its totient is φ = 1512628881400.

The previous prime is 1687661652707. The next prime is 1687661652751. The reversal of 1687661652743 is 3472561667861.

It is a happy number.

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 1687661652743 - 2¹⁴ = 1687661636359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687661652793) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1080448421 + ... + 1080449982.

It is an arithmetic number, because the mean of its divisors is an integer number (233377027632).

Almost surely, 2^{1687661652743} is an apocalyptic number.

1687661652743 is a deficient number, since it is larger than the sum of its proper divisors (179354568313).

1687661652743 is a wasteful number, since it uses less digits than its factorization.

1687661652743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160898485.

The product of its digits is 60963840, while the sum is 62.

The spelling of 1687661652743 in words is "one trillion, six hundred eighty-seven billion, six hundred sixty-one million, six hundred fifty-two thousand, seven hundred forty-three".