136780155 has 12 divisors (see below), whose sum is σ = 237085680. Its totient is φ = 72949392.

The previous prime is 136780139. The next prime is 136780169. The reversal of 136780155 is 551087631.

136780155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136780155 - 2⁴ = 136780139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1519735 + ... + 1519824.

It is an arithmetic number, because the mean of its divisors is an integer number (19757140).

Almost surely, 2^136780155 is an apocalyptic number.

136780155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136780155 is a deficient number, since it is larger than the sum of its proper divisors (100305525).

136780155 is a wasteful number, since it uses less digits than its factorization.

136780155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039570 (or 3039567 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 136780155 is about 11695.3048271518. The cubic root of 136780155 is about 515.2377762730.

The spelling of 136780155 in words is "one hundred thirty-six million, seven hundred eighty thousand, one hundred fifty-five".