135657834868789 has 4 divisors (see below), whose sum is σ = 137000981748780. Its totient is φ = 134314687988800.

The previous prime is 135657834868741. The next prime is 135657834868819. The reversal of 135657834868789 is 987868438756531.

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 102828888449764 + 32828946419025 = 10140458^2 + 5729655^2 .

It is a cyclic number.

It is not a de Polignac number, because 135657834868789 - 2⁴⁵ = 100473462779957 is a prime.

It is a super-2 number, since 2×135657834868789² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135657834868709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671573439844 + ... + 671573440045.

It is an arithmetic number, because the mean of its divisors is an integer number (34250245437195).

Almost surely, 2^{135657834868789} is an apocalyptic number.

It is an amenable number.

135657834868789 is a deficient number, since it is larger than the sum of its proper divisors (1343146879991).

135657834868789 is a wasteful number, since it uses less digits than its factorization.

135657834868789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343146879990.

The product of its digits is 58525286400, while the sum is 88.

The spelling of 135657834868789 in words is "one hundred thirty-five trillion, six hundred fifty-seven billion, eight hundred thirty-four million, eight hundred sixty-eight thousand, seven hundred eighty-nine".