1550440155 has 48 divisors (see below), whose sum is σ = 2744596512. Its totient is φ = 746803200.

The previous prime is 1550440153. The next prime is 1550440159. The reversal of 1550440155 is 5510440551.

It is not a de Polignac number, because 1550440155 - 2¹ = 1550440153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1550440153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 282235 + ... + 287675.

It is an arithmetic number, because the mean of its divisors is an integer number (57179094).

Almost surely, 2^1550440155 is an apocalyptic number.

1550440155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1550440155 is a deficient number, since it is larger than the sum of its proper divisors (1194156357).

1550440155 is a wasteful number, since it uses less digits than its factorization.

1550440155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628 (or 5617 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 1550440155 is about 39375.6289473578. The cubic root of 1550440155 is about 1157.4040629109.

The spelling of 1550440155 in words is "one billion, five hundred fifty million, four hundred forty thousand, one hundred fifty-five".