28525330813 has 8 divisors (see below), whose sum is σ = 33724529280. Its totient is φ = 23607170160.

The previous prime is 28525330811. The next prime is 28525330843. The reversal of 28525330813 is 31803352582.

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

It is not a de Polignac number, because 28525330813 - 2¹ = 28525330811 is a prime.

It is a super-3 number, since 3×28525330813³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28525330811) 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, 70259233 + ... + 70259638.

It is an arithmetic number, because the mean of its divisors is an integer number (4215566160).

Almost surely, 2^28525330813 is an apocalyptic number.

It is an amenable number.

28525330813 is a deficient number, since it is larger than the sum of its proper divisors (5199198467).

28525330813 is a wasteful number, since it uses less digits than its factorization.

28525330813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140518907.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 28525330813 in words is "twenty-eight billion, five hundred twenty-five million, three hundred thirty thousand, eight hundred thirteen".