155388647 has 16 divisors (see below), whose sum is σ = 165473280. Its totient is φ = 145675200.

The previous prime is 155388643. The next prime is 155388661. The reversal of 155388647 is 746883551.

It is not a de Polignac number, because 155388647 - 2² = 155388643 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 (155388643) 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, 227168 + ... + 227850.

It is an arithmetic number, because the mean of its divisors is an integer number (10342080).

Almost surely, 2^155388647 is an apocalyptic number.

155388647 is a deficient number, since it is larger than the sum of its proper divisors (10084633).

155388647 is a wasteful number, since it uses less digits than its factorization.

155388647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934.

The product of its digits is 806400, while the sum is 47.

The square root of 155388647 is about 12465.4982652119. The cubic root of 155388647 is about 537.6171262330.

The spelling of 155388647 in words is "one hundred fifty-five million, three hundred eighty-eight thousand, six hundred forty-seven".