155856005 has 16 divisors (see below), whose sum is σ = 196214400. Its totient is φ = 118681920.

The previous prime is 155855977. The next prime is 155856013. The reversal of 155856005 is 500658551.

It is not a de Polignac number, because 155856005 - 2¹⁸ = 155593861 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 2726 + ... + 17864.

It is an arithmetic number, because the mean of its divisors is an integer number (12263400).

Almost surely, 2^155856005 is an apocalyptic number.

It is an amenable number.

155856005 is a deficient number, since it is larger than the sum of its proper divisors (40358395).

155856005 is a wasteful number, since it uses less digits than its factorization.

155856005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15244.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 155856005 is about 12484.2302526027. The cubic root of 155856005 is about 538.1555786609.

The spelling of 155856005 in words is "one hundred fifty-five million, eight hundred fifty-six thousand, five".