136648511 has 4 divisors (see below), whose sum is σ = 140341752. Its totient is φ = 132955272.

The previous prime is 136648471. The next prime is 136648529. The reversal of 136648511 is 115846631.

136648511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115846631 = 139 ⋅833429.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136648511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136648111) 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, 1846565 + ... + 1846638.

It is an arithmetic number, because the mean of its divisors is an integer number (35085438).

Almost surely, 2^136648511 is an apocalyptic number.

136648511 is a deficient number, since it is larger than the sum of its proper divisors (3693241).

136648511 is an equidigital number, since it uses as much as digits as its factorization.

136648511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693240.

The product of its digits is 17280, while the sum is 35.

The square root of 136648511 is about 11689.6754018236. The cubic root of 136648511 is about 515.0724264243.

The spelling of 136648511 in words is "one hundred thirty-six million, six hundred forty-eight thousand, five hundred eleven".