136805087178 has 12 divisors (see below), whose sum is σ = 296411022258. Its totient is φ = 45601695720.

The previous prime is 136805087149. The next prime is 136805087203. The reversal of 136805087178 is 871780508631.

It is a happy number.

136805087178 is a `hidden beast` number, since 1 + 3 + 68 + 0 + 508 + 7 + 1 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 104954617089 + 31850470089 = 323967^2 + 178467^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3800141293 + ... + 3800141328.

Almost surely, 2^136805087178 is an apocalyptic number.

136805087178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136805087178 is an abundant number, since it is smaller than the sum of its proper divisors (159605935080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136805087178 is a wasteful number, since it uses less digits than its factorization.

136805087178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600282629 (or 7600282626 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 136805087178 in words is "one hundred thirty-six billion, eight hundred five million, eighty-seven thousand, one hundred seventy-eight".