1550680320 has 144 divisors (see below), whose sum is σ = 5660081280. Its totient is φ = 354435072.

The previous prime is 1550680291. The next prime is 1550680331. The reversal of 1550680320 is 230860551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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, 1965 + ... + 55724.

It is an arithmetic number, because the mean of its divisors is an integer number (39306120).

Almost surely, 2^1550680320 is an apocalyptic number.

1550680320 is a gapful number since it is divisible by the number (10) 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 1550680320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2830040640).

1550680320 is an abundant number, since it is smaller than the sum of its proper divisors (4109400960).

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

1550680320 is an equidigital number, since it uses as much as digits as its factorization.

1550680320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57720 (or 57706 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1550680320 is about 39378.6784948403. The cubic root of 1550680320 is about 1157.4638209081.

The spelling of 1550680320 in words is "one billion, five hundred fifty million, six hundred eighty thousand, three hundred twenty".