28543636550 has 192 divisors, whose sum is σ = 64390878720. Its totient is φ = 9276288000.

The previous prime is 28543636547. The next prime is 28543636567. The reversal of 28543636550 is 5563634582.

It is a junction number, because it is equal to n+sod(n) for n = 28543636495 and 28543636504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29950874 + ... + 29951826.

It is an arithmetic number, because the mean of its divisors is an integer number (335369160).

Almost surely, 2^28543636550 is an apocalyptic number.

28543636550 is an abundant number, since it is smaller than the sum of its proper divisors (35847242170).

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

28543636550 is a wasteful number, since it uses less digits than its factorization.

28543636550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 28543636550 in words is "twenty-eight billion, five hundred forty-three million, six hundred thirty-six thousand, five hundred fifty".