136396311409 has 4 divisors (see below), whose sum is σ = 136439794404. Its totient is φ = 136352828416.

The previous prime is 136396311329. The next prime is 136396311437. The reversal of 136396311409 is 904113693631.

It is a happy number.

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 130975229025 + 5421082384 = 361905^2 + 73628^2 .

It is a cyclic number.

It is not a de Polignac number, because 136396311409 - 2³¹ = 134248827761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136396311209) 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, 21736792 + ... + 21743065.

It is an arithmetic number, because the mean of its divisors is an integer number (34109948601).

Almost surely, 2^136396311409 is an apocalyptic number.

It is an amenable number.

136396311409 is a deficient number, since it is larger than the sum of its proper divisors (43482995).

136396311409 is an equidigital number, since it uses as much as digits as its factorization.

136396311409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43482994.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 136396311409 in words is "one hundred thirty-six billion, three hundred ninety-six million, three hundred eleven thousand, four hundred nine".