136909871641 has 4 divisors (see below), whose sum is σ = 139230378000. Its totient is φ = 134589365284.

The previous prime is 136909871627. The next prime is 136909871687. The reversal of 136909871641 is 146178909631.

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 a de Polignac number, because none of the positive numbers 2^k-136909871641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136909871611) 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, 1160253091 + ... + 1160253208.

It is an arithmetic number, because the mean of its divisors is an integer number (34807594500).

Almost surely, 2^136909871641 is an apocalyptic number.

It is an amenable number.

136909871641 is a deficient number, since it is larger than the sum of its proper divisors (2320506359).

136909871641 is an equidigital number, since it uses as much as digits as its factorization.

136909871641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320506358.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 136909871641 in words is "one hundred thirty-six billion, nine hundred nine million, eight hundred seventy-one thousand, six hundred forty-one".