136551649 has 16 divisors (see below), whose sum is σ = 149333184. Its totient is φ = 124113600.

The previous prime is 136551647. The next prime is 136551661. The reversal of 136551649 is 946155631.

It is a happy number.

It is not a de Polignac number, because 136551649 - 2¹ = 136551647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136551647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308022 + ... + 308464.

It is an arithmetic number, because the mean of its divisors is an integer number (9333324).

Almost surely, 2^136551649 is an apocalyptic number.

It is an amenable number.

136551649 is a deficient number, since it is larger than the sum of its proper divisors (12781535).

136551649 is a wasteful number, since it uses less digits than its factorization.

136551649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768.

The product of its digits is 97200, while the sum is 40.

The square root of 136551649 is about 11685.5316096445. The cubic root of 136551649 is about 514.9506962572.

The spelling of 136551649 in words is "one hundred thirty-six million, five hundred fifty-one thousand, six hundred forty-nine".