136517805 has 20 divisors (see below), whose sum is σ = 244721532. Its totient is φ = 72809280.

The previous prime is 136517791. The next prime is 136517839. The reversal of 136517805 is 508715631.

136517805 is a `hidden beast` number, since 136 + 517 + 8 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14768649 + 121749156 = 3843^2 + 11034^2 .

It is not a de Polignac number, because 136517805 - 2⁷ = 136517677 is a prime.

It is a super-2 number, since 2×136517805² = 37274222164036050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136517805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 168136 + ... + 168945.

Almost surely, 2^136517805 is an apocalyptic number.

136517805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136517805 is a deficient number, since it is larger than the sum of its proper divisors (108203727).

136517805 is an equidigital number, since it uses as much as digits as its factorization.

136517805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337098 (or 337089 counting only the distinct ones).

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

The square root of 136517805 is about 11684.0834043583. The cubic root of 136517805 is about 514.9081496420.

The spelling of 136517805 in words is "one hundred thirty-six million, five hundred seventeen thousand, eight hundred five".