136686510869 has 4 divisors (see below), whose sum is σ = 141399838860. Its totient is φ = 131973182880.

The previous prime is 136686510823. The next prime is 136686510913. The reversal of 136686510869 is 968015686631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76666410769 + 60020100100 = 276887^2 + 244990^2 .

It is a cyclic number.

It is not a de Polignac number, because 136686510869 - 2³⁶ = 67967034133 is a prime.

It is a super-2 number, since 2×136686510869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136686518869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2356663952 + ... + 2356664009.

It is an arithmetic number, because the mean of its divisors is an integer number (35349959715).

Almost surely, 2^136686510869 is an apocalyptic number.

It is an amenable number.

136686510869 is a deficient number, since it is larger than the sum of its proper divisors (4713327991).

136686510869 is an equidigital number, since it uses as much as digits as its factorization.

136686510869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713327990.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 136686510869 in words is "one hundred thirty-six billion, six hundred eighty-six million, five hundred ten thousand, eight hundred sixty-nine".