155867647 has 16 divisors (see below), whose sum is σ = 175035168. Its totient is φ = 137854080.

The previous prime is 155867639. The next prime is 155867653. The reversal of 155867647 is 746768551.

It is a happy number.

It is not a de Polignac number, because 155867647 - 2³ = 155867639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155867647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155867687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26997 + ... + 32257.

It is an arithmetic number, because the mean of its divisors is an integer number (10939698).

Almost surely, 2^155867647 is an apocalyptic number.

155867647 is a deficient number, since it is larger than the sum of its proper divisors (19167521).

155867647 is a wasteful number, since it uses less digits than its factorization.

155867647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370.

The product of its digits is 1411200, while the sum is 49.

The square root of 155867647 is about 12484.6965121304. The cubic root of 155867647 is about 538.1689778907.

The spelling of 155867647 in words is "one hundred fifty-five million, eight hundred sixty-seven thousand, six hundred forty-seven".