155564145 has 40 divisors (see below), whose sum is σ = 304223040. Its totient is φ = 75422880.

The previous prime is 155564141. The next prime is 155564147. The reversal of 155564145 is 541465551.

155564145 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 641 + 4 + 5 = 666.

It is not a de Polignac number, because 155564145 - 2² = 155564141 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (155564141) 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 39 ways as a sum of consecutive naturals, for example, 13005 + ... + 21914.

It is an arithmetic number, because the mean of its divisors is an integer number (7605576).

Almost surely, 2^155564145 is an apocalyptic number.

155564145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155564145 is a deficient number, since it is larger than the sum of its proper divisors (148658895).

155564145 is a wasteful number, since it uses less digits than its factorization.

155564145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34947 (or 34938 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 155564145 is about 12472.5356283316. The cubic root of 155564145 is about 537.8194473896.

It can be divided in two parts, 15556 and 4145, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 155564145 in words is "one hundred fifty-five million, five hundred sixty-four thousand, one hundred forty-five".