136549400194 has 4 divisors (see below), whose sum is σ = 204824100294. Its totient is φ = 68274700096.

The previous prime is 136549400171. The next prime is 136549400243. The reversal of 136549400194 is 491004945631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 491004945631 = 179 ⋅2743044389.

It can be written as a sum of positive squares in only one way, i.e., 78364723969 + 58184676225 = 279937^2 + 241215^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34137350047 + ... + 34137350050.

Almost surely, 2^136549400194 is an apocalyptic number.

136549400194 is a deficient number, since it is larger than the sum of its proper divisors (68274700100).

136549400194 is an equidigital number, since it uses as much as digits as its factorization.

136549400194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68274700099.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 136549400194 in words is "one hundred thirty-six billion, five hundred forty-nine million, four hundred thousand, one hundred ninety-four".