1550440145 has 8 divisors (see below), whose sum is σ = 1860978240. Its totient is φ = 1240052080.

The previous prime is 1550440127. The next prime is 1550440153. The reversal of 1550440145 is 5410440551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1550440145 - 2⁶ = 1550440081 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13355 + ... + 57264.

It is an arithmetic number, because the mean of its divisors is an integer number (232622280).

Almost surely, 2^1550440145 is an apocalyptic number.

It is an amenable number.

1550440145 is a deficient number, since it is larger than the sum of its proper divisors (310538095).

1550440145 is an equidigital number, since it uses as much as digits as its factorization.

1550440145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75015.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1550440145 is about 39375.6288203757. The cubic root of 1550440145 is about 1157.4040604226.

Adding to 1550440145 its reverse (5410440551), we get a palindrome (6960880696).

The spelling of 1550440145 in words is "one billion, five hundred fifty million, four hundred forty thousand, one hundred forty-five".