155605044 has 48 divisors (see below), whose sum is σ = 419078016. Its totient is φ = 44016000.

The previous prime is 155605033. The next prime is 155605049. The reversal of 155605044 is 440506551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155605049) by changing a digit.

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, 687 + ... + 17654.

It is an arithmetic number, because the mean of its divisors is an integer number (8730792).

Almost surely, 2^155605044 is an apocalyptic number.

155605044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155605044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209539008).

155605044 is an abundant number, since it is smaller than the sum of its proper divisors (263472972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155605044 is a wasteful number, since it uses less digits than its factorization.

155605044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18456 (or 18454 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 155605044 is about 12474.1750829464. The cubic root of 155605044 is about 537.8665755377.

The spelling of 155605044 in words is "one hundred fifty-five million, six hundred five thousand, forty-four".