135959757818 has 4 divisors (see below), whose sum is σ = 203939636730. Its totient is φ = 67979878908.

The previous prime is 135959757757. The next prime is 135959757827. The reversal of 135959757818 is 818757959531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818757959531 = 654499 ⋅1250969.

It can be written as a sum of positive squares in only one way, i.e., 121736094649 + 14223663169 = 348907^2 + 119263^2 .

It is a super-2 number, since 2×135959757818² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33989939453 + ... + 33989939456.

Almost surely, 2^135959757818 is an apocalyptic number.

135959757818 is a deficient number, since it is larger than the sum of its proper divisors (67979878912).

135959757818 is an equidigital number, since it uses as much as digits as its factorization.

135959757818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67979878911.

The product of its digits is 95256000, while the sum is 68.

The spelling of 135959757818 in words is "one hundred thirty-five billion, nine hundred fifty-nine million, seven hundred fifty-seven thousand, eight hundred eighteen".