136851813 has 24 divisors (see below), whose sum is σ = 237806400. Its totient is φ = 74084544.

The previous prime is 136851797. The next prime is 136851821. The reversal of 136851813 is 318158631.

136851813 is a `hidden beast` number, since 136 + 8 + 518 + 1 + 3 = 666.

It is not a de Polignac number, because 136851813 - 2⁴ = 136851797 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 (136851893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55968 + ... + 58361.

It is an arithmetic number, because the mean of its divisors is an integer number (9908600).

Almost surely, 2^136851813 is an apocalyptic number.

It is an amenable number.

136851813 is a deficient number, since it is larger than the sum of its proper divisors (100954587).

136851813 is a wasteful number, since it uses less digits than its factorization.

136851813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114361 (or 114358 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 136851813 is about 11698.3679630964. The cubic root of 136851813 is about 515.3277368450.

The spelling of 136851813 in words is "one hundred thirty-six million, eight hundred fifty-one thousand, eight hundred thirteen".