28537068365 has 8 divisors (see below), whose sum is σ = 36878673048. Its totient is φ = 21073527360.

The previous prime is 28537068361. The next prime is 28537068367. The reversal of 28537068365 is 56386073582.

It can be written as a sum of positive squares in 4 ways, for example, as 1973936041 + 26563132324 = 44429^2 + 162982^2 .

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

It is not a de Polignac number, because 28537068365 - 2² = 28537068361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28537068361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219515846 + ... + 219515975.

It is an arithmetic number, because the mean of its divisors is an integer number (4609834131).

Almost surely, 2^28537068365 is an apocalyptic number.

It is an amenable number.

28537068365 is a deficient number, since it is larger than the sum of its proper divisors (8341604683).

28537068365 is a wasteful number, since it uses less digits than its factorization.

28537068365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439031839.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 28537068365 in words is "twenty-eight billion, five hundred thirty-seven million, sixty-eight thousand, three hundred sixty-five".