136731963661 has 4 divisors (see below), whose sum is σ = 138973471324. Its totient is φ = 134490456000.

The previous prime is 136731963653. The next prime is 136731963673. The reversal of 136731963661 is 166369137631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166369137631 = 155801 ⋅1067831.

It can be written as a sum of positive squares in 2 ways, for example, as 3017414761 + 133714548900 = 54931^2 + 365670^2 .

It is a cyclic number.

It is not a de Polignac number, because 136731963661 - 2³ = 136731963653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136731963599 and 136731963608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136731963691) 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, 1120753740 + ... + 1120753861.

It is an arithmetic number, because the mean of its divisors is an integer number (34743367831).

Almost surely, 2^136731963661 is an apocalyptic number.

It is an amenable number.

136731963661 is a deficient number, since it is larger than the sum of its proper divisors (2241507663).

136731963661 is an equidigital number, since it uses as much as digits as its factorization.

136731963661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241507662.

The product of its digits is 2204496, while the sum is 52.

The spelling of 136731963661 in words is "one hundred thirty-six billion, seven hundred thirty-one million, nine hundred sixty-three thousand, six hundred sixty-one".