163803604650 has 576 divisors, whose sum is σ = 518033510400. Its totient is φ = 33431823360.

The previous prime is 163803604621. The next prime is 163803604651. The reversal of 163803604650 is 56406308361.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (163803604651) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2073463311 + ... + 2073463389.

Almost surely, 2^163803604650 is an apocalyptic number.

163803604650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 163803604650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259016755200).

163803604650 is an abundant number, since it is smaller than the sum of its proper divisors (354229905750).

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

163803604650 is a wasteful number, since it uses less digits than its factorization.

163803604650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 163803604650 in words is "one hundred sixty-three billion, eight hundred three million, six hundred four thousand, six hundred fifty".