28550422525 has 12 divisors (see below), whose sum is σ = 35628022612. Its totient is φ = 22694855040.

The previous prime is 28550422519. The next prime is 28550422531. The reversal of 28550422525 is 52522405582.

It is an interprime number because it is at equal distance from previous prime (28550422519) and next prime (28550422531).

It can be written as a sum of positive squares in 6 ways, for example, as 320374201 + 28230048324 = 17899^2 + 168018^2 .

It is not a de Polignac number, because 28550422525 - 2²³ = 28542033917 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, 3633072 + ... + 3640921.

Almost surely, 2^28550422525 is an apocalyptic number.

28550422525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28550422525 is a deficient number, since it is larger than the sum of its proper divisors (7077600087).

28550422525 is a wasteful number, since it uses less digits than its factorization.

28550422525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7274160 (or 7274155 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 40.

The spelling of 28550422525 in words is "twenty-eight billion, five hundred fifty million, four hundred twenty-two thousand, five hundred twenty-five".