136778111 has 8 divisors (see below), whose sum is σ = 138338304. Its totient is φ = 135225720.

The previous prime is 136778101. The next prime is 136778119. The reversal of 136778111 is 111877631.

136778111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136778111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136778119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37766 + ... + 41228.

It is an arithmetic number, because the mean of its divisors is an integer number (17292288).

Almost surely, 2^136778111 is an apocalyptic number.

136778111 is a deficient number, since it is larger than the sum of its proper divisors (1560193).

136778111 is a wasteful number, since it uses less digits than its factorization.

136778111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901.

The product of its digits is 7056, while the sum is 35.

The square root of 136778111 is about 11695.2174413305. The cubic root of 136778111 is about 515.2352097427.

The spelling of 136778111 in words is "one hundred thirty-six million, seven hundred seventy-eight thousand, one hundred eleven".