27815193579601 has 4 divisors (see below), whose sum is σ = 27859274711104. Its totient is φ = 27771112448100.

The previous prime is 27815193579517. The next prime is 27815193579617. The reversal of 27815193579601 is 10697539151872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27815193579601 - 2¹¹ = 27815193577553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27815193579301) 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, 22040564805 + ... + 22040566066.

It is an arithmetic number, because the mean of its divisors is an integer number (6964818677776).

Almost surely, 2^{27815193579601} is an apocalyptic number.

It is an amenable number.

27815193579601 is a deficient number, since it is larger than the sum of its proper divisors (44081131503).

27815193579601 is an equidigital number, since it uses as much as digits as its factorization.

27815193579601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44081131502.

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 27815193579601 in words is "twenty-seven trillion, eight hundred fifteen billion, one hundred ninety-three million, five hundred seventy-nine thousand, six hundred one".