136529643779 has 4 divisors (see below), whose sum is σ = 141237562560. Its totient is φ = 131821725000.

The previous prime is 136529643743. The next prime is 136529643793. The reversal of 136529643779 is 977346925631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977346925631 = 1033 ⋅946124807.

It is a cyclic number.

It is not a de Polignac number, because 136529643779 - 2¹² = 136529639683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136529643709) 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, 2353959347 + ... + 2353959404.

It is an arithmetic number, because the mean of its divisors is an integer number (35309390640).

Almost surely, 2^136529643779 is an apocalyptic number.

136529643779 is a deficient number, since it is larger than the sum of its proper divisors (4707918781).

136529643779 is an equidigital number, since it uses as much as digits as its factorization.

136529643779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4707918780.

The product of its digits is 51438240, while the sum is 62.

The spelling of 136529643779 in words is "one hundred thirty-six billion, five hundred twenty-nine million, six hundred forty-three thousand, seven hundred seventy-nine".