28111051552 has 12 divisors (see below), whose sum is σ = 55343632806. Its totient is φ = 14055525760.

The previous prime is 28111051531. The next prime is 28111051567. The reversal of 28111051552 is 25515011182.

It can be written as a sum of positive squares in only one way, i.e., 23680285456 + 4430766096 = 153884^2 + 66564^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439235149 + ... + 439235212.

Almost surely, 2^28111051552 is an apocalyptic number.

It is an amenable number.

28111051552 is a deficient number, since it is larger than the sum of its proper divisors (27232581254).

28111051552 is an equidigital number, since it uses as much as digits as its factorization.

28111051552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878470371 (or 878470363 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 31.

The spelling of 28111051552 in words is "twenty-eight billion, one hundred eleven million, fifty-one thousand, five hundred fifty-two".