163557002550 has 96 divisors (see below), whose sum is σ = 429918903072. Its totient is φ = 41007790080.

The previous prime is 163557002461. The next prime is 163557002579. The reversal of 163557002550 is 55200755361.

It is a junction number, because it is equal to n+sod(n) for n = 163557002499 and 163557002508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2510184 + ... + 2574516.

It is an arithmetic number, because the mean of its divisors is an integer number (4478321907).

Almost surely, 2^163557002550 is an apocalyptic number.

163557002550 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 163557002550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214959451536).

163557002550 is an abundant number, since it is smaller than the sum of its proper divisors (266361900522).

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

163557002550 is a wasteful number, since it uses less digits than its factorization.

163557002550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65362 (or 65357 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 39.

The spelling of 163557002550 in words is "one hundred sixty-three billion, five hundred fifty-seven million, two thousand, five hundred fifty".