28525993797 has 16 divisors (see below), whose sum is σ = 43472535552. Its totient is φ = 16298934960.

The previous prime is 28525993789. The next prime is 28525993801. The reversal of 28525993797 is 79739952582.

It is not a de Polignac number, because 28525993797 - 2³ = 28525993789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28525993747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165172 + ... + 290402.

It is an arithmetic number, because the mean of its divisors is an integer number (2717033472).

Almost surely, 2^28525993797 is an apocalyptic number.

It is an amenable number.

28525993797 is a deficient number, since it is larger than the sum of its proper divisors (14946541755).

28525993797 is a wasteful number, since it uses less digits than its factorization.

28525993797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136088.

The product of its digits is 85730400, while the sum is 66.

The spelling of 28525993797 in words is "twenty-eight billion, five hundred twenty-five million, nine hundred ninety-three thousand, seven hundred ninety-seven".