28100655056 has 20 divisors (see below), whose sum is σ = 54450540612. Its totient is φ = 14048902656.

The previous prime is 28100655049. The next prime is 28100655061. The reversal of 28100655056 is 65055600182.

It can be written as a sum of positive squares in 2 ways, for example, as 7358894656 + 20741760400 = 85784^2 + 144020^2 .

It is a congruent number.

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, 83816 + ... + 251448.

Almost surely, 2^28100655056 is an apocalyptic number.

It is a pronic number, being equal to 167632×167633.

It is an amenable number.

28100655056 is a deficient number, since it is larger than the sum of its proper divisors (26349885556).

28100655056 is a wasteful number, since it uses less digits than its factorization.

28100655056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178118 (or 178112 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 28100655056 in words is "twenty-eight billion, one hundred million, six hundred fifty-five thousand, fifty-six".