136165155661 has 4 divisors (see below), whose sum is σ = 139331787232. Its totient is φ = 132998524092.

The previous prime is 136165155653. The next prime is 136165155701. The reversal of 136165155661 is 166551561631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136165155661 - 2³ = 136165155653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136165155631) 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, 1583315721 + ... + 1583315806.

It is an arithmetic number, because the mean of its divisors is an integer number (34832946808).

Almost surely, 2^136165155661 is an apocalyptic number.

It is an amenable number.

136165155661 is a deficient number, since it is larger than the sum of its proper divisors (3166631571).

136165155661 is an equidigital number, since it uses as much as digits as its factorization.

136165155661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166631570.

The product of its digits is 486000, while the sum is 46.

The spelling of 136165155661 in words is "one hundred thirty-six billion, one hundred sixty-five million, one hundred fifty-five thousand, six hundred sixty-one".