28352813578337 has 4 divisors (see below), whose sum is σ = 28353469921476. Its totient is φ = 28352157235200.

The previous prime is 28352813578307. The next prime is 28352813578339. The reversal of 28352813578337 is 73387531825382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12292204288576 + 16060609289761 = 3506024^2 + 4007569^2 .

It is a cyclic number.

It is not a de Polignac number, because 28352813578337 - 2²² = 28352809384033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28352813578339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328106768 + ... + 328193169.

It is an arithmetic number, because the mean of its divisors is an integer number (7088367480369).

Almost surely, 2^{28352813578337} is an apocalyptic number.

It is an amenable number.

28352813578337 is a deficient number, since it is larger than the sum of its proper divisors (656343139).

28352813578337 is an equidigital number, since it uses as much as digits as its factorization.

28352813578337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656343138.

The product of its digits is 203212800, while the sum is 65.

The spelling of 28352813578337 in words is "twenty-eight trillion, three hundred fifty-two billion, eight hundred thirteen million, five hundred seventy-eight thousand, three hundred thirty-seven".