28550451172 has 12 divisors (see below), whose sum is σ = 52135606656. Its totient is φ = 13654563560.

The previous prime is 28550451143. The next prime is 28550451191. The reversal of 28550451172 is 27115405582.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155165404 + ... + 155165587.

It is an arithmetic number, because the mean of its divisors is an integer number (4344633888).

Almost surely, 2^28550451172 is an apocalyptic number.

It is an amenable number.

28550451172 is a deficient number, since it is larger than the sum of its proper divisors (23585155484).

28550451172 is a wasteful number, since it uses less digits than its factorization.

28550451172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310331018 (or 310331016 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The spelling of 28550451172 in words is "twenty-eight billion, five hundred fifty million, four hundred fifty-one thousand, one hundred seventy-two".