136513922018 has 4 divisors (see below), whose sum is σ = 204770883030. Its totient is φ = 68256961008.

The previous prime is 136513922003. The next prime is 136513922023. The reversal of 136513922018 is 810229315631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810229315631 = 941 ⋅861030091.

It can be written as a sum of positive squares in only one way, i.e., 136476308329 + 37613689 = 369427^2 + 6133^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34128480503 + ... + 34128480506.

Almost surely, 2^136513922018 is an apocalyptic number.

136513922018 is a deficient number, since it is larger than the sum of its proper divisors (68256961012).

136513922018 is an equidigital number, since it uses as much as digits as its factorization.

136513922018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68256961011.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 136513922018 in words is "one hundred thirty-six billion, five hundred thirteen million, nine hundred twenty-two thousand, eighteen".