1563385500 has 144 divisors (see below), whose sum is σ = 4981319616. Its totient is φ = 412732800.

The previous prime is 1563385477. The next prime is 1563385513. The reversal of 1563385500 is 55833651.

1563385500 is a `hidden beast` number, since 15 + 63 + 3 + 85 + 500 = 666.

It is a super-2 number, since 2×1563385500² = 4888348443220500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 461814 + ... + 465186.

Almost surely, 2^1563385500 is an apocalyptic number.

1563385500 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 1563385500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2490659808).

1563385500 is an abundant number, since it is smaller than the sum of its proper divisors (3417934116).

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

1563385500 is a wasteful number, since it uses less digits than its factorization.

1563385500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1563385500 is about 39539.6699530990. The cubic root of 1563385500 is about 1160.6163737753.

The spelling of 1563385500 in words is "one billion, five hundred sixty-three million, three hundred eighty-five thousand, five hundred".