28525398567 has 8 divisors (see below), whose sum is σ = 38569553280. Its totient is φ = 18749088120.

The previous prime is 28525398553. The next prime is 28525398607. The reversal of 28525398567 is 76589352582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28525398567 - 2⁷ = 28525398439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28525398567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28525398067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66960817 + ... + 66961242.

It is an arithmetic number, because the mean of its divisors is an integer number (4821194160).

Almost surely, 2^28525398567 is an apocalyptic number.

28525398567 is a deficient number, since it is larger than the sum of its proper divisors (10044154713).

28525398567 is a wasteful number, since it uses less digits than its factorization.

28525398567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133922133.

The product of its digits is 36288000, while the sum is 60.

The spelling of 28525398567 in words is "twenty-eight billion, five hundred twenty-five million, three hundred ninety-eight thousand, five hundred sixty-seven".