136778005 has 32 divisors (see below), whose sum is σ = 213905664. Its totient is φ = 81478656.

The previous prime is 136777999. The next prime is 136778029. The reversal of 136778005 is 500877631.

It is not a de Polignac number, because 136778005 - 2³ = 136777997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1107 + ... + 16576.

It is an arithmetic number, because the mean of its divisors is an integer number (6684552).

Almost surely, 2^136778005 is an apocalyptic number.

It is an amenable number.

136778005 is a deficient number, since it is larger than the sum of its proper divisors (77127659).

136778005 is a wasteful number, since it uses less digits than its factorization.

136778005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17725.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 136778005 is about 11695.2129095626. The cubic root of 136778005 is about 515.2350766440.

The spelling of 136778005 in words is "one hundred thirty-six million, seven hundred seventy-eight thousand, five".