1320544550 has 48 divisors (see below), whose sum is σ = 2650424112. Its totient is φ = 486614400.

The previous prime is 1320544529. The next prime is 1320544559. The reversal of 1320544550 is 554450231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320544559) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 379820 + ... + 383280.

It is an arithmetic number, because the mean of its divisors is an integer number (55217169).

Almost surely, 2^1320544550 is an apocalyptic number.

1320544550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320544550 is an abundant number, since it is smaller than the sum of its proper divisors (1329879562).

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

1320544550 is a wasteful number, since it uses less digits than its factorization.

1320544550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073 (or 4068 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1320544550 is about 36339.2975991557. The cubic root of 1320544550 is about 1097.1121357788.

Adding to 1320544550 its reverse (554450231), we get a palindrome (1874994781).

The spelling of 1320544550 in words is "one billion, three hundred twenty million, five hundred forty-four thousand, five hundred fifty".