136581551 has 2 divisors, whose sum is σ = 136581552. Its totient is φ = 136581550.

The previous prime is 136581547. The next prime is 136581589. The reversal of 136581551 is 155185631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136581551 - 2² = 136581547 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136580551) 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 as a sum of consecutive naturals, namely, 68290775 + 68290776.

It is an arithmetic number, because the mean of its divisors is an integer number (68290776).

Almost surely, 2^136581551 is an apocalyptic number.

136581551 is a deficient number, since it is larger than the sum of its proper divisors (1).

136581551 is an equidigital number, since it uses as much as digits as its factorization.

136581551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 35.

The square root of 136581551 is about 11686.8109850378. The cubic root of 136581551 is about 514.9882813810.

The spelling of 136581551 in words is "one hundred thirty-six million, five hundred eighty-one thousand, five hundred fifty-one".