28155124548 has 18 divisors (see below), whose sum is σ = 71169898254. Its totient is φ = 9385041504.

The previous prime is 28155124523. The next prime is 28155124553. The reversal of 28155124548 is 84542155182.

28155124548 is a `hidden beast` number, since 2 + 81 + 5 + 5 + 1 + 24 + 548 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18628974144 + 9526150404 = 136488^2 + 97602^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×28155124548² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 391043361 + ... + 391043432.

Almost surely, 2^28155124548 is an apocalyptic number.

It is an amenable number.

28155124548 is an abundant number, since it is smaller than the sum of its proper divisors (43014773706).

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

28155124548 is a wasteful number, since it uses less digits than its factorization.

28155124548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782086803 (or 782086798 counting only the distinct ones).

The product of its digits is 512000, while the sum is 45.

The spelling of 28155124548 in words is "twenty-eight billion, one hundred fifty-five million, one hundred twenty-four thousand, five hundred forty-eight".