534731781685 has 4 divisors (see below), whose sum is σ = 641678138028. Its totient is φ = 427785425344.

The previous prime is 534731781673. The next prime is 534731781707. The reversal of 534731781685 is 586187137435.

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 390646250289 + 144085531396 = 625017^2 + 379586^2 .

It is a cyclic number.

It is not a de Polignac number, because 534731781685 - 2⁷ = 534731781557 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53473178164 + ... + 53473178173.

It is an arithmetic number, because the mean of its divisors is an integer number (160419534507).

Almost surely, 2^534731781685 is an apocalyptic number.

It is an amenable number.

534731781685 is a deficient number, since it is larger than the sum of its proper divisors (106946356343).

534731781685 is a wasteful number, since it uses less digits than its factorization.

534731781685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106946356342.

The product of its digits is 16934400, while the sum is 58.

The spelling of 534731781685 in words is "five hundred thirty-four billion, seven hundred thirty-one million, seven hundred eighty-one thousand, six hundred eighty-five".