136780005 has 16 divisors (see below), whose sum is σ = 219366144. Its totient is φ = 72776640.

The previous prime is 136779989. The next prime is 136780051. The reversal of 136780005 is 500087631.

It is not a de Polignac number, because 136780005 - 2⁴ = 136779989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4114 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (13710384).

Almost surely, 2^136780005 is an apocalyptic number.

136780005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136780005 is a deficient number, since it is larger than the sum of its proper divisors (82586139).

136780005 is a wasteful number, since it uses less digits than its factorization.

136780005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21596.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 136780005 is about 11695.2984143202. The cubic root of 136780005 is about 515.2375879277.

The spelling of 136780005 in words is "one hundred thirty-six million, seven hundred eighty thousand, five".