136864551 has 4 divisors (see below), whose sum is σ = 182486072. Its totient is φ = 91243032.

The previous prime is 136864549. The next prime is 136864589. The reversal of 136864551 is 155468631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155468631 = 3 ⋅51822877.

It is not a de Polignac number, because 136864551 - 2¹ = 136864549 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 (136864051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22810756 + ... + 22810761.

It is an arithmetic number, because the mean of its divisors is an integer number (45621518).

Almost surely, 2^136864551 is an apocalyptic number.

136864551 is a deficient number, since it is larger than the sum of its proper divisors (45621521).

136864551 is an equidigital number, since it uses as much as digits as its factorization.

136864551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45621520.

The product of its digits is 86400, while the sum is 39.

The square root of 136864551 is about 11698.9123853459. The cubic root of 136864551 is about 515.3437250415.

The spelling of 136864551 in words is "one hundred thirty-six million, eight hundred sixty-four thousand, five hundred fifty-one".