136906308865 has 8 divisors (see below), whose sum is σ = 168294584808. Its totient is φ = 106853704320.

The previous prime is 136906308863. The next prime is 136906308871. The reversal of 136906308865 is 568803609631.

It can be written as a sum of positive squares in 4 ways, for example, as 5016038976 + 131890269889 = 70824^2 + 363167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136906308865 - 2¹ = 136906308863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136906308863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333917622 + ... + 333918031.

It is an arithmetic number, because the mean of its divisors is an integer number (21036823101).

Almost surely, 2^136906308865 is an apocalyptic number.

It is an amenable number.

136906308865 is a deficient number, since it is larger than the sum of its proper divisors (31388275943).

136906308865 is an equidigital number, since it uses as much as digits as its factorization.

136906308865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667835699.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 136906308865 in words is "one hundred thirty-six billion, nine hundred six million, three hundred eight thousand, eight hundred sixty-five".