136816461 has 12 divisors (see below), whose sum is σ = 204438780. Its totient is φ = 88065600.

The previous prime is 136816451. The next prime is 136816481. The reversal of 136816461 is 164618631.

136816461 is a `hidden beast` number, since 1 + 3 + 6 + 8 + 1 + 646 + 1 = 666.

136816461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117288900 + 19527561 = 10830^2 + 4419^2 .

It is not a de Polignac number, because 136816461 - 2¹¹ = 136814413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136816441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261840 + ... + 262361.

It is an arithmetic number, because the mean of its divisors is an integer number (17036565).

Almost surely, 2^136816461 is an apocalyptic number.

It is an amenable number.

136816461 is a deficient number, since it is larger than the sum of its proper divisors (67622319).

136816461 is a wasteful number, since it uses less digits than its factorization.

136816461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524236 (or 524233 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 136816461 is about 11696.8568855056. The cubic root of 136816461 is about 515.2833593180.

The spelling of 136816461 in words is "one hundred thirty-six million, eight hundred sixteen thousand, four hundred sixty-one".