15563000000 has 196 divisors, whose sum is σ = 39290122080. Its totient is φ = 6115200000.

The previous prime is 15562999987. The next prime is 15563000021. The reversal of 15563000000 is 36551.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 78999902 + ... + 79000098.

Almost surely, 2^15563000000 is an apocalyptic number.

15563000000 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 15563000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19645061040).

15563000000 is an abundant number, since it is smaller than the sum of its proper divisors (23727122080).

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

15563000000 is an frugal number, since it uses more digits than its factorization.

15563000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

Adding to 15563000000 its reverse (36551), we get a palindrome (15563036551).

The spelling of 15563000000 in words is "fifteen billion, five hundred sixty-three million", and thus it is an aban number.