28073556625 has 16 divisors (see below), whose sum is σ = 35113899600. Its totient is φ = 22408780800.

The previous prime is 28073556619. The next prime is 28073556649. The reversal of 28073556625 is 52665537082.

It can be written as a sum of positive squares in 8 ways, for example, as 10993941904 + 17079614721 = 104852^2 + 130689^2 .

It is not a de Polignac number, because 28073556625 - 2⁹ = 28073556113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193974 + ... + 306223.

It is an arithmetic number, because the mean of its divisors is an integer number (2194618725).

Almost surely, 2^28073556625 is an apocalyptic number.

28073556625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28073556625 is a deficient number, since it is larger than the sum of its proper divisors (7040342975).

28073556625 is an equidigital number, since it uses as much as digits as its factorization.

28073556625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500661 (or 500651 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 28073556625 in words is "twenty-eight billion, seventy-three million, five hundred fifty-six thousand, six hundred twenty-five".