154545809 has 16 divisors (see below), whose sum is σ = 177306624. Its totient is φ = 133333200.

The previous prime is 154545799. The next prime is 154545863. The reversal of 154545809 is 908545451.

It is a de Polignac number, because none of the positive numbers 2^k-154545809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154545889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30812 + ... + 35474.

It is an arithmetic number, because the mean of its divisors is an integer number (11081664).

Almost surely, 2^154545809 is an apocalyptic number.

It is an amenable number.

154545809 is a deficient number, since it is larger than the sum of its proper divisors (22760815).

154545809 is a wasteful number, since it uses less digits than its factorization.

154545809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828.

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 154545809 is about 12431.6454663090. The cubic root of 154545809 is about 536.6433402067.

The spelling of 154545809 in words is "one hundred fifty-four million, five hundred forty-five thousand, eight hundred nine".