28025005525 has 12 divisors (see below), whose sum is σ = 37910189664. Its totient is φ = 20381822000.

The previous prime is 28025005507. The next prime is 28025005537. The reversal of 28025005525 is 52550052082.

It is a happy number.

It is not a de Polignac number, because 28025005525 - 2¹⁷ = 28024874453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50954281 + ... + 50954830.

It is an arithmetic number, because the mean of its divisors is an integer number (3159182472).

Almost surely, 2^28025005525 is an apocalyptic number.

28025005525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28025005525 is a deficient number, since it is larger than the sum of its proper divisors (9885184139).

28025005525 is a wasteful number, since it uses less digits than its factorization.

28025005525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101909132 (or 101909127 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 28025005525 in words is "twenty-eight billion, twenty-five million, five thousand, five hundred twenty-five".