27899579285 has 4 divisors (see below), whose sum is σ = 33479495148. Its totient is φ = 22319663424.

The previous prime is 27899579207. The next prime is 27899579293. The reversal of 27899579285 is 58297599872.

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 21622820209 + 6276759076 = 147047^2 + 79226^2 .

It is a cyclic number.

It is not a de Polignac number, because 27899579285 - 2¹⁸ = 27899317141 is a prime.

It is a super-2 number, since 2×27899579285² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789957924 + ... + 2789957933.

It is an arithmetic number, because the mean of its divisors is an integer number (8369873787).

Almost surely, 2^27899579285 is an apocalyptic number.

It is an amenable number.

27899579285 is a deficient number, since it is larger than the sum of its proper divisors (5579915863).

27899579285 is an equidigital number, since it uses as much as digits as its factorization.

27899579285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5579915862.

The product of its digits is 228614400, while the sum is 71.

The spelling of 27899579285 in words is "twenty-seven billion, eight hundred ninety-nine million, five hundred seventy-nine thousand, two hundred eighty-five".