28555815325 has 12 divisors (see below), whose sum is σ = 35411497408. Its totient is φ = 22843177200.

The previous prime is 28555815317. The next prime is 28555815349. The reversal of 28555815325 is 52351855582.

It is not a de Polignac number, because 28555815325 - 2³ = 28555815317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 527260 + ... + 578890.

Almost surely, 2^28555815325 is an apocalyptic number.

28555815325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28555815325 is a deficient number, since it is larger than the sum of its proper divisors (6855682083).

28555815325 is a wasteful number, since it uses less digits than its factorization.

28555815325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73764 (or 73759 counting only the distinct ones).

The product of its digits is 2400000, while the sum is 49.

The spelling of 28555815325 in words is "twenty-eight billion, five hundred fifty-five million, eight hundred fifteen thousand, three hundred twenty-five".