1563969280 has 72 divisors (see below), whose sum is σ = 3847560192. Its totient is φ = 608661504.

The previous prime is 1563969257. The next prime is 1563969283. The reversal of 1563969280 is 829693651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563969283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30849 + ... + 63871.

It is an arithmetic number, because the mean of its divisors is an integer number (53438336).

Almost surely, 2^1563969280 is an apocalyptic number.

1563969280 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 1563969280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923780096).

1563969280 is an abundant number, since it is smaller than the sum of its proper divisors (2283590912).

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

1563969280 is an equidigital number, since it uses as much as digits as its factorization.

1563969280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33081 (or 33067 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 1563969280 is about 39547.0514703688. The cubic root of 1563969280 is about 1160.7608167828.

The spelling of 1563969280 in words is "one billion, five hundred sixty-three million, nine hundred sixty-nine thousand, two hundred eighty".