1689185344653 has 6 divisors (see below), whose sum is σ = 2439934386734. Its totient is φ = 1126123563096.

The previous prime is 1689185344643. The next prime is 1689185344663. The reversal of 1689185344653 is 3564435819861.

It is a happy number.

1689185344653 is a `hidden beast` number, since 1 + 6 + 8 + 9 + 1 + 8 + 534 + 46 + 53 = 666.

It is an interprime number because it is at equal distance from previous prime (1689185344643) and next prime (1689185344663).

It can be written as a sum of positive squares in only one way, i.e., 944352481284 + 744832863369 = 971778^2 + 863037^2 .

It is not a de Polignac number, because 1689185344653 - 2³⁸ = 1414307437709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689185344643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93843630250 + ... + 93843630267.

Almost surely, 2^{1689185344653} is an apocalyptic number.

It is an amenable number.

1689185344653 is a deficient number, since it is larger than the sum of its proper divisors (750749042081).

1689185344653 is a wasteful number, since it uses less digits than its factorization.

1689185344653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187687260523 (or 187687260520 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 63.

The spelling of 1689185344653 in words is "one trillion, six hundred eighty-nine billion, one hundred eighty-five million, three hundred forty-four thousand, six hundred fifty-three".